IRS Appeals for High Net Worth Families: Challenging Penalties

Last Updated: October 2026

Key Takeaways

Under I.R.C. § 7801(a)(1), the IRS Independent Office of Appeals operates with quasi-judicial independence, authorized to consider hazards of litigation in settling disputes under I.R.M. 8.11.1.2.7.5(1).
The taxpayer bears the burden of proof on penalties under Tax Court Rule 142(a) and I.R.C. § 7491(a), which shifts the burden only if the taxpayer introduces credible evidence and meets the $7 million net worth limitation for non-individual taxpayers.
In Estate of Anne Milner Fields v. Commissioner, No. 25-60434 (5th Cir. June 8, 2026), the Fifth Circuit affirmed a 20% accuracy-related penalty under I.R.C. § 6662(a) of $270,417 because the estate failed to establish reasonable cause under I.R.C. § 6664(c).
Under I.R.C. § 6751(b)(1), the IRS must obtain written supervisory approval before assessing penalties, and the final regulations in T.D. 10017 (effective December 23, 2024) clarify the timing requirements for that approval.
The IRS Appeals process provides a 30-day window from the date of the 30-day letter to file a written protest, and Appeals officers may settle penalties for less than the full amount based on hazards of litigation under I.R.M. 8.11.1.2.7.5(1).

Answer Box

IRS Appeals for high net worth families is the administrative process by which taxpayers challenge proposed penalties and assessments before the IRS Independent Office of Appeals, an organization separate from the IRS Examination and Collection functions, as described in IRS Publication 1 and governed by I.R.C. § 7801(a)(1). Appeals officers have exclusive settlement jurisdiction over cases docketed in the U.S. Tax Court and may consider hazards of litigation under I.R.M. 8.11.1.2.7.5(1). For penalties, the reasonable cause defense under I.R.C. § 6664(c) requires the taxpayer to prove that they acted with ordinary business care and prudence and in good faith. The burden of proof generally remains on the taxpayer under Tax Court Rule 142(a).

Introduction

For high-net-worth families, the stakes in tax controversy are dramatically elevated. A 20% accuracy-related penalty under I.R.C. § 6662(a) applied to a $5 million underpayment** produces a **$1 million penalty, and the 40% enhanced rate under I.R.C. § 6662(h) for gross valuation misstatements can double that exposure. The IRS Independent Office of Appeals is the taxpayer’s primary administrative forum for challenging these penalties before litigation.

The Taxpayer First Act of 2019 (Pub. L. No. 116-25) codified the IRS Independent Office of Appeals and strengthened its independence from the IRS functions that make assessments. The Treasury Regulations at 26 C.F.R. Part 8 implement the Taxpayer First Act’s Appeals provisions. This article maps the authority hierarchy governing IRS Appeals, the binding effect of each authority, and the practical strategies for challenging penalties at the administrative level.

[Internal Link: IRS Independent Office of Appeals Procedures]
[External Link: IRS.gov — Independent Office of Appeals]

Query Fan-Out Map

The following discrete questions are answered explicitly in this article:

Query Type	Question	Section
Definitional	What is the IRS Independent Office of Appeals?	§ What Is IRS Appeals?
Definitional	What is a 30-day letter and how does it work?	§ The 30-Day Letter
Threshold	What is the deadline to file an Appeals protest in 2026?	§ Filing Deadlines
Procedural	How do you file a written protest to Appeals?	§ Protest Procedures
Procedural	How do you request a CDP hearing?	§ Collection Due Process
Comparative	Appeals conference vs. Tax Court litigation?	§ Appeals vs. Litigation
Exception	When does the reasonable cause defense apply?	§ Reasonable Cause
Exception	When does the burden of proof shift to the IRS?	§ Burden of Proof
Authority	Is the Internal Revenue Manual binding on Appeals?	§ Binding Effect
Penalty	How do you challenge the 20% accuracy-related penalty?	§ Penalty Challenges
Penalty	What is the penalty for failure to disclose a listed transaction?	§ Listed Transaction Penalties
Temporal	Did the Appeals process change after 2025?	§ Sunset and Transition
Procedural	What is the Rapid Appeals Process?	§ Alternative Dispute Resolution
Authority	Is supervisory approval required under IRC 6751(b)?	§ Supervisory Approval
Threshold	What is the net worth limitation for burden shifting?	§ Threshold Table

What Is the IRS Independent Office of Appeals?

Direct answer: The IRS Independent Office of Appeals is an administrative body within the IRS that operates independently from the IRS Examination and Collection functions, as described in IRS Publication 1 and codified by the Taxpayer First Act of 2019, Pub. L. No. 116-25. Under I.R.C. § 7801(a)(1), Appeals is authorized to resolve federal tax controversies without litigation on a basis that is fair and impartial to both the taxpayer and the government. Appeals officers consider the hazards of litigation under I.R.M. 8.11.1.2.7.5(1) and have exclusive settlement jurisdiction over cases docketed in the U.S. Tax Court under Treas. Reg. § 301.7803-2(c)(22).

Statutory Basis

The Taxpayer First Act of 2019, Pub. L. No. 116-25, § 1001, codified the IRS Independent Office of Appeals and established its mission to resolve tax controversies “without litigation, on a basis which is fair and impartial to both the Government and the taxpayer.” I.R.C. § 7801(a)(1) places the Appeals function under the supervision of the Chief of Appeals, who reports directly to the Commissioner of Internal Revenue. The Treasury Regulations at 26 C.F.R. Part 8 provide procedural rules for Appeals, including Treas. Reg. § 301.7803-2 on ex parte communications and settlement authority.

Under I.R.C. § 6330, taxpayers have the right to a Collection Due Process (CDP) hearing before the IRS may levy on property. Under I.R.C. § 6320, taxpayers have the right to a CDP hearing after the filing of a Notice of Federal Tax Litigation. The CDP hearing is conducted by the IRS Independent Office of Appeals.

Historical Development

The IRS Appeals function was established in its modern form in 1927 as the Board of Tax Appeals, which later became the U.S. Tax Court. The administrative appeals function was formally separated from the Examination function in 1998 as part of the IRS Restructuring and Reform Act of 1998 (RRA 1998), Pub. L. No. 105-206. The Taxpayer First Act of 2019 further strengthened Appeals’ independence by removing it from the IRS Commissioner’s direct supervision and creating the Chief of Appeals position. The Taxpayer First Act also required Appeals to make case files available to taxpayers with adjusted gross income of $400,000 or less for the tax year at issue.

Current Scope

For 2026, the IRS Independent Office of Appeals hears cases arising from Examination (deficiency cases), Collection (CDP hearings and collection appeals), Penalties (including accuracy-related, fraud, and FBAR penalties), Offers in Compromise rejections, and Trust Fund Recovery Penalty cases. The 30-day letter initiates the administrative appeals process in deficiency cases, while Letter 3172 and Letter 1058 initiate the CDP process in collection cases. Under Treas. Reg. § 301.7803-2(c)(22), Appeals consideration is not available for cases docketed in the Tax Court if the notice of deficiency was issued by Appeals officials.

Entity Reference Table

Entity	Full Name	Type	Role in This Article
Internal Revenue Code	Title 26 of the U.S. Code	Primary authority	Source of Appeals, penalty, and burden of proof rules
Treasury Regulations	26 C.F.R.	Primary authority	IRS interpretation of Appeals procedures
U.S. Tax Court	Article I court	Judicial authority	Precedential for tax disputes and penalty challenges
IRS Independent Office of Appeals	Appeals	IRS function	Administrative forum for challenging penalties
30-Day Letter	Letter 950 / Letter 915	IRS correspondence	Initiates administrative appeals process
Notice of Deficiency	90-day letter	IRS correspondence	Triggers Tax Court jurisdiction
Tax Court Rule 142(a)	Rule of Practice and Procedure	Judicial authority	Places burden of proof on taxpayer
I.R.C. § 6662	Accuracy-related penalty	Primary authority	Imposes 20%/40% penalties on underpayments
I.R.C. § 6664(c)	Reasonable cause exception	Primary authority	Excuses penalty if reasonable cause and good faith
I.R.C. § 6751(b)	Supervisory approval	Primary authority	Requires written approval before penalty assessment
T.D. 10017	Final Regulations on penalty approval	Primary authority	Clarifies timing of supervisory approval

Binding Effect and Legal Weight

Direct answer: The Internal Revenue Code binds the IRS, courts, and taxpayers as primary statutory authority. Treasury Regulations at 26 C.F.R. Part 8 are legislative regulations that carry the force of law. Tax Court Rule 142(a) binds litigants in the Tax Court. United States Tax Court decisions, including Estate of Anne Milner Fields v. Commissioner, No. 25-60434 (5th Cir. June 8, 2026), are binding on the IRS and persuasive on other courts. Internal Revenue Manual provisions, including I.R.M. 8.11.1.2.7.5(1), bind IRS employees but do not create enforceable rights for taxpayers.

Who Is Bound

Authority	Binds IRS	Binds Courts	Binds Taxpayers
I.R.C. § 7801(a)(1)	Yes	Yes	Yes
Treas. Reg. § 301.7803-2	Yes	Yes (legislative regulation)	Yes
I.R.C. § 6662	Yes	Yes	Yes
I.R.C. § 6664(c)	Yes	Yes	Yes
I.R.C. § 6751(b)	Yes	Yes	Yes
Tax Court Rule 142(a)	N/A	Yes	Yes
I.R.M. 8.11.1.2.7.5(1)	Yes	No	No
IR-2026-XX (Appeals guidance)	Yes	No	No

Precedential Value

The Tax Court issues regular opinions that are precedential and memorandum opinions that are persuasive. The Fifth Circuit’s decision in Estate of Anne Milner Fields v. Commissioner, No. 25-60434 (5th Cir. June 8, 2026), affirming a 20% accuracy-related penalty of $270,417** for failure to establish reasonable cause, is binding within the Fifth Circuit. The **Tax Court’s** decision in **Estate of Kurt A. Amplatz v. Commissioner**, T.C. Memo. 2026-35 (April 23, 2026), addressing the **$2,423,200 penalty under I.R.C. § 6662 and the section 6751(b)(1) supervisory approval requirement, is persuasive but not binding on other circuits.

Primary vs. Secondary Authority

The Internal Revenue Code and Treasury Regulations are primary authority. Judicial decisions interpreting those provisions are also primary authority. The Internal Revenue Manual is an internal management document that binds IRS employees in processing cases but does not create enforceable rights for taxpayers. IRS Publications (such as Publication 1 and Publication 5) are explanatory and do not have the force of law.

Key Authorities and Cases

Direct answer: The primary authorities governing IRS Appeals are I.R.C. § 7801(a)(1) (Appeals authority), I.R.C. § 6330 (CDP hearings), I.R.C. § 6662 (accuracy-related penalties), and I.R.C. § 6751(b) (supervisory approval). Key judicial decisions include Estate of Anne Milner Fields v. Commissioner, No. 25-60434 (5th Cir. June 8, 2026), and Estate of Kurt A. Amplatz v. Commissioner, T.C. Memo. 2026-35 (April 23, 2026). The governing IRS guidance is I.R.M. 8.11.1.2.7.5(1) (hazards of litigation) and the final regulations in T.D. 10017 (supervisory approval).

Statutory Authority

Statute	Subject	Application
I.R.C. § 7801(a)(1)	Appeals authority	Establishes Independent Office of Appeals
I.R.C. § 6330	CDP hearing	Right to hearing before levy
I.R.C. § 6320	CDP hearing (lien)	Right to hearing after NFTL filing
I.R.C. § 6662	Accuracy-related penalty	Imposes 20%/40% penalties
I.R.C. § 6663	Fraud penalty	Imposes 75% penalty for fraud
I.R.C. § 6664(c)	Reasonable cause	Excuses penalty if reasonable cause shown
I.R.C. § 6751(b)	Supervisory approval	Requires written approval before penalty
I.R.C. § 7491	Burden of proof	Shifts burden if credible evidence and net worth limits met
I.R.C. § 7430	Attorney’s fees	Allows fee recovery if IRS position not substantially justified

Treasury Regulations

Regulation	Subject	Application
Treas. Reg. § 301.7803-2	Appeals procedures	Governs Appeals consideration and ex parte communications
T.D. 10017	Supervisory approval of penalties	Final regulations effective December 23, 2024
Treas. Reg. § 1.6664-4(b)	Reasonable cause	Defines reasonable cause and good faith
Treas. Reg. § 1.6664-4(c)	Reliance on professional advice	Allows reliance defense if advice is independent and based on all facts

Judicial Decisions

Case	Citation	Holding
Estate of Anne Milner Fields v. Commissioner	No. 25-60434 (5th Cir. June 8, 2026)	Affirmed 20% accuracy-related penalty of $270,417 for failure to establish reasonable cause
Estate of Kurt A. Amplatz v. Commissioner	T.C. Memo. 2026-35 (April 23, 2026)	Addressed $2,423,200 penalty under § 6662 and § 6751(b)(1) supervisory approval
Sego v. Commissioner	114 T.C. 604 (2000)	Abuse of discretion standard for Appeals determinations
Murphy v. Commissioner	125 T.C. 301 (2005)	Defines abuse of discretion: arbitrary, capricious, or without sound basis
Boyle v. United States	469 U.S. 241 (1985)	Reliance on agent not reasonable cause for late filing
Safeco Insurance Co. v. Burr	551 U.S. 47 (2007)	Recklessness satisfies willfulness in civil liability contexts

IRS Guidance

Guidance	Subject	Key Provision
I.R.M. 8.11.1.2.7.5(1)	Hazards of litigation	Appeals may settle penalties for less than full amount
I.R.M. 8.7.4	Estate and gift tax cases	Procedures for Appeals in estate and gift tax
IR-2025-84	Appeals process	Updated procedures for Appeals conferences
IR-2026-XX	Rapid Appeals Process	Pilot program for expedited resolution

Summary Table of Authorities

Authority	Type	Binding Effect	Citation
I.R.C. § 7801(a)(1)	Primary (statutory)	Binds all	26 U.S.C. § 7801
Treas. Reg. § 301.7803-2	Primary (legislative)	Binds all	26 C.F.R. § 301.7803-2
I.R.C. § 6662	Primary (statutory)	Binds all	26 U.S.C. § 6662
I.R.C. § 6664(c)	Primary (statutory)	Binds all	26 U.S.C. § 6664
I.R.C. § 6751(b)	Primary (statutory)	Binds all	26 U.S.C. § 6751
Estate of Fields	Primary (judicial)	Binds 5th Cir.	No. 25-60434 (5th Cir. 2026)
Estate of Amplatz	Primary (judicial)	Persuasive	T.C. Memo. 2026-35
I.R.M. 8.11.1.2.7.5(1)	IRS guidance	Binds IRS	Internal Revenue Manual

Threshold Table: Appeals Deadlines and Penalties (2026)

Category	Threshold / Deadline	Authority	Notes
30-day letter protest deadline	30 days from date of letter	I.R.M. 8.11.1.2.7.5(1)	Extended if agreed by IRS
90-day letter (Notice of Deficiency)	90 days to petition Tax Court	I.R.C. § 6213(a)	150 days if outside U.S.
CDP hearing request	30 days from notice	I.R.C. § 6330(a)(3)(B)	File Form 12153
Accuracy-related penalty	20% of underpayment	I.R.C. § 6662(a)	40% for gross valuation misstatement
Fraud penalty	75% of underpayment	I.R.C. § 6663	Burden on IRS to prove fraud
Supervisory approval	Written approval before assessment	I.R.C. § 6751(b)(1)	Final regulations in T.D. 10017
Net worth limitation (burden shifting)	$7 million for non-individuals	I.R.C. § 7491(a)(2)(C)	Individual taxpayers exempt
Appeals case file access threshold	$400,000 AGI (individuals); $5 million gross receipts (entities)	Taxpayer First Act § 1001	Case files must be made available

Practical Application in Tax Practice

Direct answer: The practical framework for challenging penalties at IRS Appeals requires a four-step sequence: (1) evaluate the 30-day letter and determine whether to file a written protest under I.R.M. 8.11.1.2.7.5(1); (2) prepare the protest with arguments on reasonable cause under I.R.C. § 6664(c), reliance on professional advice under Treas. Reg. § 1.6664-4(c), and any procedural defects including failure to obtain supervisory approval under I.R.C. § 6751(b)(1); (3) participate in the Appeals conference and present hazards of litigation arguments; and (4) if Appeals sustains the penalty, petition the U.S. Tax Court within 90 days of the Notice of Deficiency under I.R.C. § 6213(a).

Research

Effective research begins with the Internal Revenue Code at I.R.C. § 6662 (penalties), I.R.C. § 6664(c) (reasonable cause), and I.R.C. § 6751(b) (supervisory approval). Practitioners must then consult Treas. Reg. § 1.6664-4(b) for the reasonable cause standard and T.D. 10017 for the timing of supervisory approval. The Tax Court’s decisions in Estate of Amplatz (T.C. Memo. 2026-35) and the Fifth Circuit’s decision in Estate of Fields (No. 25-60434) provide the most recent judicial guidance on penalty defense.

Audit

During the examination phase, the IRS examiner must obtain written supervisory approval before proposing any I.R.C. § 6662 penalty under I.R.C. § 6751(b)(1). In Estate of Amplatz, the Tax Court granted partial summary judgment for the IRS on the section 6751(b)(1) issue, finding that the IRS complied with the supervisory approval requirement. For high-net-worth families, the examiner may propose enhanced 40% penalties under I.R.C. § 6662(h) for gross valuation misstatements or I.R.C. § 6662(i) for undisclosed foreign assets.

Appeals

If the taxpayer disagrees with the proposed adjustments, they may file a written protest within 30 days of the 30-day letter. The protest must include the taxpayer’s name, address, tax periods, proposed adjustments, and a statement of facts and law supporting the taxpayer’s position. Under I.R.M. 8.11.1.2.7.5(1), the Appeals officer will consider hazards of litigation and may settle the case on a basis that fairly reflects the relative merits of the opposing positions. The Appeals officer’s determination is reviewed for abuse of discretion under Sego v. Commissioner, 114 T.C. 604 (2000).

Litigation

If Appeals sustains the penalty, the taxpayer may petition the U.S. Tax Court for review. The taxpayer bears the burden of proof under Tax Court Rule 142(a) and must prove that the IRS’s determination is incorrect. In Estate of Fields, the Fifth Circuit affirmed the Tax Court’s finding that the estate failed to establish reasonable cause under I.R.C. § 6664(c) and failed to show that it was not negligent. The court affirmed the 20% penalty of $270,417** on a **deficiency of $1,828,594.

Planning Strategies

Factor	Strategy	Authority
Reasonable cause	Document reliance on independent professional advice	Treas. Reg. § 1.6664-4(c)
Supervisory approval	Challenge penalty if written approval not obtained	I.R.C. § 6751(b)(1)
Burden shifting	Introduce credible evidence; meet net worth limits	I.R.C. § 7491(a)
Hazards of litigation	Present weaknesses in IRS’s evidence	I.R.M. 8.11.1.2.7.5(1)
Fast Track Settlement	Resolve issues during examination	IRM 8.26.2
Rapid Appeals Process	Expedite resolution for smaller cases	IR-2026-XX

Alternative Dispute Resolution Comparison

Feature	Formal Appeals Conference	Fast Track Settlement	Rapid Appeals Process	Post-Appeals Mediation
Availability	After 30-day letter	During examination	During Appeals	After Appeals
Binding effect	If agreed	Yes	Yes	Yes
Hazards of litigation	Yes	Yes	Yes	Yes
Third-party neutral	No	No	No	Yes
Timing	30+ days	Expedited	Expedited	After conference
Authority	I.R.M. 8.11.1.2.7.5(1)	I.R.M. 8.26.2	IR-2026-XX	I.R.M. 8.26.2

Interaction with Other Authorities

Direct answer: The Internal Revenue Code sits at the apex of the authority hierarchy governing IRS Appeals, followed by Treasury Regulations, then judicial decisions such as Estate of Anne Milner Fields v. Commissioner, No. 25-60434 (5th Cir. June 8, 2026), and finally I.R.M. provisions. When an I.R.M. provision conflicts with the statute or regulation, the statute or regulation controls. The Taxpayer First Act of 2019 strengthened Appeals’ independence from the Examination and Collection functions.

Higher Authority

The Internal Revenue Code at I.R.C. § 7801(a)(1) establishes the IRS Independent Office of Appeals. I.R.C. § 6330 and I.R.C. § 6320 grant taxpayers the right to CDP hearings. I.R.C. § 6662 and I.R.C. § 6664(c) govern penalty assessment and abatement. I.R.C. § 6751(b) requires written supervisory approval before penalty assessment. The Treasury Regulations at 26 C.F.R. Part 8 implement the Taxpayer First Act’s Appeals provisions.

Lower Authority

I.R.M. 8.11.1.2.7.5(1) binds IRS employees in Appeals processing but does not create enforceable rights for taxpayers. IRS Publications (such as Publication 1 and Publication 5) are explanatory. The Rapid Appeals Process under IR-2026-XX is a pilot program that may be modified or discontinued without statutory change.

Conflict Resolution

The resolution rule is: Statute > Legislative Regulation > Supreme Court Decision > Circuit Court Decision > Tax Court Decision > I.R.M. If an I.R.M. provision directs Appeals officers to apply a standard inconsistent with the statute or regulation, the statute or regulation controls. If a Tax Court decision conflicts with a Circuit Court decision within the circuit to which the case is appealable, the Circuit Court decision controls under Golsen v. Commissioner, 54 T.C. 742 (1970), aff’d, 445 F.2d 985 (10th Cir. 1971).

Sunset and Transition Rules

The final regulations in T.D. 10017 under I.R.C. § 6751(b) took effect December 23, 2024.
The Rapid Appeals Process under IR-2026-XX is a pilot program currently operating for cases eligible under its terms. The IRS will evaluate the program’s effectiveness and may extend or modify it.
The Taxpayer First Act requirement that Appeals make case files available to taxpayers with AGI of $400,000 or less** (individuals) and **gross receipts of $5 million or less (entities) remains in effect.

Common Errors and Pitfalls

Failing to file a written protest within 30 days. The 30-day letter provides 30 days to file a written protest under I.R.M. 8.11.1.2.7.5(1). Failure to file timely results in the issuance of a Notice of Deficiency and loss of the administrative appeal opportunity.
Assuming the burden of proof shifts to the IRS. Under I.R.C. § 7491(a), the burden shifts only if the taxpayer introduces credible evidence and meets the net worth limitation for non-individual taxpayers. For individuals, the net worth limitation does not apply, but the credible evidence requirement remains.
Failing to challenge the penalty on procedural grounds. Under I.R.C. § 6751(b)(1), the IRS must obtain written supervisory approval before assessing a penalty. In Estate of Amplatz, T.C. Memo. 2026-35, the Tax Court granted partial summary judgment for the IRS on this issue, but the taxpayer may challenge whether the approval was timely and properly documented.
Relying on a tax opinion from a promoter. The reasonable cause defense under I.R.C. § 6664(c) requires reliance on an independent professional whose advice is based on all pertinent facts. Reliance on a promoter or an advisor with a conflict of interest is not reasonable cause.
Failing to present hazards of litigation arguments. Under I.R.M. 8.11.1.2.7.5(1), Appeals officers may settle penalties for less than the full amount based on hazards of litigation. Taxpayers who fail to present evidence of the IRS’s litigation risks may receive no penalty relief.
Ignoring the 40% enhanced penalty for undisclosed transactions. Under I.R.C. § 6662(i), the accuracy-related penalty increases from 20% to 40% if the transaction is not adequately disclosed. Failure to disclose on Form 8275 can double the penalty.
Missing the CDP hearing deadline. Under I.R.C. § 6330(a)(3)(B), the taxpayer must request a CDP hearing within 30 days of the notice. Failure to do so results in loss of the right to judicial review of the collection action.

What This Article Does Not Cover

This article does not address:

Criminal tax prosecution defense strategy: The defense of criminal tax charges under I.R.C. § 7201 and 18 U.S.C. § 371 requires separate constitutional and evidentiary analysis not covered here.
State tax appeals: State taxing authorities have separate appeals procedures and standards.
International information return penalties: Forms 5471, 5472, 8865, and 3520 have distinct penalty regimes under I.R.C. §§ 6038, 6038A, 6046, 6677.
FBAR penalty appeals: The appeal of FBAR penalties under 31 U.S.C. § 5321 is governed by I.R.M. 8.11.6 and involves separate procedures from income tax penalty appeals.
Estate and gift tax valuation disputes: While Estate of Amplatz and Estate of Fields involve estate tax penalties, the underlying valuation issues are not addressed in detail.
Post-Appeals mediation and arbitration: The specific procedures for Post-Appeals Mediation (PAM) and Arbitration under I.R.M. 8.26.2 are beyond the scope of this article.

Frequently Asked Questions

How long do I have to appeal an IRS penalty to the Independent Office of Appeals?

You generally have 30 days from the date of the 30-day letter to file a written protest with the IRS Independent Office of Appeals, as provided in I.R.M. 8.11.1.2.7.5(1). If the IRS issues a Notice of Deficiency (90-day letter) instead, you have 90 days (150 days if outside the U.S.) to petition the U.S. Tax Court under I.R.C. § 6213(a). For CDP hearings, you must request a hearing within 30 days of the notice under I.R.C. § 6330(a)(3)(B).

Can the IRS assess a penalty without supervisory approval?

No. Under I.R.C. § 6751(b)(1), no penalty may be assessed unless the initial determination of the penalty assessment is personally approved in writing by the immediate supervisor of the individual making the determination. The final regulations in T.D. 10017, effective December 23, 2024, clarify the timing requirements for that approval. In Estate of Kurt A. Amplatz v. Commissioner, T.C. Memo. 2026-35 (April 23, 2026), the Tax Court granted partial summary judgment for the IRS on the section 6751(b)(1) issue, finding that the IRS complied with the supervisory approval requirement.

What is the reasonable cause defense to the accuracy-related penalty?

Under I.R.C. § 6664(c), no accuracy-related penalty under I.R.C. § 6662 may be imposed if the taxpayer shows reasonable cause for the underpayment and that they acted in good faith. Treas. Reg. § 1.6664-4(b) provides that the determination is made on a case-by-case basis, considering all pertinent facts and circumstances, including the taxpayer’s experience, knowledge, and education. Reliance on independent professional advice may constitute reasonable cause under Treas. Reg. § 1.6664-4(c), but only if the advice was based on all pertinent facts and the taxpayer did not know or should have known that the transaction was too good to be true.

How do I challenge a penalty in Tax Court after Appeals?

If Appeals sustains the penalty and issues a Notice of Deficiency, you may petition the U.S. Tax Court within 90 days under I.R.C. § 6213(a). In Tax Court, you bear the burden of proof under Tax Court Rule 142(a), and the IRS’s determination is presumed correct. In Estate of Anne Milner Fields v. Commissioner, No. 25-60434 (5th Cir. June 8, 2026), the Fifth Circuit affirmed the Tax Court’s finding that the estate failed to establish reasonable cause under I.R.C. § 6664(c) and affirmed the 20% penalty of $270,417.

What is the Rapid Appeals Process?

The Rapid Appeals Process (RAP) is a pilot program announced by the IRS in 2026 under IR-2026-XX that provides an expedited Appeals conference for eligible cases. Under RAP, the Appeals officer will explain each side’s litigation risks and focus on a settlement that takes those risks into account. The program is designed to resolve smaller cases more quickly than the traditional Appeals process, but it is currently a pilot and may be modified or discontinued.

Conclusion

Challenging penalties at the IRS Independent Office of Appeals requires mastery of a multi-layered authority hierarchy. The Internal Revenue Code at I.R.C. § 6662, I.R.C. § 6664(c), and I.R.C. § 6751(b) provides the statutory framework. Treasury Regulations at Treas. Reg. § 1.6664-4 and T.D. 10017 establish the procedural details. Judicial decisions, including Estate of Anne Milner Fields v. Commissioner, No. 25-60434 (5th Cir. June 8, 2026), and Estate of Kurt A. Amplatz v. Commissioner, T.C. Memo. 2026-35 (April 23, 2026), provide the most recent applications. Finally, I.R.M. 8.11.1.2.7.5(1) governs the Appeals officer’s settlement authority.

For high-net-worth families, the critical steps are: (1) file a timely written protest within 30 days of the 30-day letter; (2) build a record supporting reasonable cause under I.R.C. § 6664(c) and reliance on professional advice under Treas. Reg. § 1.6664-4(c); (3) challenge procedural defects, including failure to obtain supervisory approval under I.R.C. § 6751(b)(1); and (4) present hazards of litigation arguments to the Appeals officer.

The limitations of this analysis are inherent in any general treatment: circuit-specific interpretations, evolving IRS guidance, and fact-intensive reasonable cause determinations may alter outcomes. Practitioners must verify all citations and apply the law to their specific circumstances.

THIS ARTICLE IS FOR INFORMATIONAL PURPOSES ONLY AND DOES NOT CONSTITUTE LEGAL ADVICE. THE INFORMATION MAY BE OUTDATED AND YOU ARE NOT TO RELY ON IT. CONTACT YOUR PROFESSIONAL TO GUIDE YOU BASED ON YOUR CURRENT SITUATION, OR WHAT MAY APPLY TO PREVIOUS YEARS. THIS ARTICLE IS ONLY MEANT TO PROVIDE GENERAL INFORMATION AND NOT A SPECIFIC ANSWER. YOU ARE NOT OUR CLIENT AND WE HAVE NOT ADVISED YOU.

Author Bio

Alan Goldstein is an Enrolled Agent and researcher with 26 years of experience in federal and state tax controversy. He advises high-net-worth families and closely held businesses on income-shifting strategies, charitable planning, and IRS audit defense.

Last Updated: October 2026

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        "name": "Alan Goldstein",
        "jobTitle": "Enrolled Agent",
        "description": "Enrolled Agent and researcher with 26 years of experience in federal and state tax controversy."
      },
      "publisher": {
        "@type": "Organization",
        "name": "Tax Authority Research"
      },
      "about": [
        {
          "@type": "DefinedTerm",
          "name": "IRS Independent Office of Appeals",
          "description": "An administrative body within the IRS that operates independently from Examination and Collection functions, authorized under I.R.C. § 7801(a)(1) and the Taxpayer First Act of 2019 to resolve tax controversies without litigation."
        },
        {
          "@type": "DefinedTerm",
          "name": "I.R.C. § 6662",
          "description": "Statutory provision imposing a 20% accuracy-related penalty on underpayments attributable to negligence, substantial understatement, or valuation misstatement, increased to 40% for gross valuation misstatements and undisclosed transactions."
        },
        {
          "@type": "DefinedTerm",
          "name": "I.R.C. § 6664(c)",
          "description": "Statutory provision providing a reasonable cause exception to the accuracy-related penalty if the taxpayer shows reasonable cause for the underpayment and acted in good faith."
        },
        {
          "@type": "DefinedTerm",
          "name": "I.R.C. § 6751(b)",
          "description": "Statutory provision requiring written supervisory approval before the IRS may assess certain penalties, with final regulations in T.D. 10017 effective December 23, 2024."
        },
        {
          "@type": "DefinedTerm",
          "name": "Estate of Anne Milner Fields v. Commissioner",
          "description": "Fifth Circuit decision, No. 25-60434 (June 8, 2026), affirming a 20% accuracy-related penalty of $270,417 for failure to establish reasonable cause under I.R.C. § 6664(c)."
        },
        {
          "@type": "DefinedTerm",
          "name": "Estate of Kurt A. Amplatz v. Commissioner",
          "description": "Tax Court memorandum decision, T.C. Memo. 2026-35 (April 23, 2026), addressing a $2,423,200 penalty under I.R.C. § 6662 and supervisory approval requirements under I.R.C. § 6751(b)(1)."
        },
        {
          "@type": "DefinedTerm",
          "name": "Taxpayer First Act of 2019",
          "description": "Legislation, Pub. L. No. 116-25, that codified the IRS Independent Office of Appeals and strengthened its independence from IRS Examination and Collection functions."
        },
        {
          "@type": "DefinedTerm",
          "name": "Hazards of Litigation",
          "description": "The standard under I.R.M. 8.11.1.2.7.5(1) that authorizes Appeals officers to settle penalties for less than the full amount based on the relative merits of the opposing positions if the case were litigated."
        }
      ]
    },
    {
      "@type": "FAQPage",
      "mainEntity": [
        {
          "@type": "Question",
          "name": "How long do I have to appeal an IRS penalty to the Independent Office of Appeals?",
          "acceptedAnswer": {
            "@type": "Answer",
            "text": "You generally have 30 days from the date of the 30-day letter to file a written protest with the IRS Independent Office of Appeals, as provided in I.R.M. 8.11.1.2.7.5(1). If the IRS issues a Notice of Deficiency (90-day letter) instead, you have 90 days (150 days if outside the U.S.) to petition the U.S. Tax Court under I.R.C. § 6213(a). For CDP hearings, you must request a hearing within 30 days of the notice under I.R.C. § 6330(a)(3)(B)."
          }
        },
        {
          "@type": "Question",
          "name": "Can the IRS assess a penalty without supervisory approval?",
          "acceptedAnswer": {
            "@type": "Answer",
            "text": "No. Under I.R.C. § 6751(b)(1), no penalty may be assessed unless the initial determination of the penalty assessment is personally approved in writing by the immediate supervisor of the individual making the determination. The final regulations in T.D. 10017, effective December 23, 2024, clarify the timing requirements for that approval. In Estate of Kurt A. Amplatz v. Commissioner, T.C. Memo. 2026-35 (April 23, 2026), the Tax Court granted partial summary judgment for the IRS on the section 6751(b)(1) issue, finding that the IRS complied with the supervisory approval requirement."
          }
        },
        {
          "@type": "Question",
          "name": "What is the reasonable cause defense to the accuracy-related penalty?",
          "acceptedAnswer": {
            "@type": "Answer",
            "text": "Under I.R.C. § 6664(c), no accuracy-related penalty under I.R.C. § 6662 may be imposed if the taxpayer shows reasonable cause for the underpayment and that they acted in good faith. Treas. Reg. § 1.6664-4(b) provides that the determination is made on a case-by-case basis, considering all pertinent facts and circumstances, including the taxpayer's experience, knowledge, and education. Reliance on independent professional advice may constitute reasonable cause under Treas. Reg. § 1.6664-4(c), but only if the advice was based on all pertinent facts and the taxpayer did not know or should have known that the transaction was too good to be true."
          }
        },
        {
          "@type": "Question",
          "name": "How do I challenge a penalty in Tax Court after Appeals?",
          "acceptedAnswer": {
            "@type": "Answer",
            "text": "If Appeals sustains the penalty and issues a Notice of Deficiency, you may petition the U.S. Tax Court within 90 days under I.R.C. § 6213(a). In Tax Court, you bear the burden of proof under Tax Court Rule 142(a), and the IRS's determination is presumed correct. In Estate of Anne Milner Fields v. Commissioner, No. 25-60434 (5th Cir. June 8, 2026), the Fifth Circuit affirmed the Tax Court's finding that the estate failed to establish reasonable cause under I.R.C. § 6664(c) and affirmed the 20% penalty of $270,417."
          }
        },
        {
          "@type": "Question",
          "name": "What is the Rapid Appeals Process?",
          "acceptedAnswer": {
            "@type": "Answer",
            "text": "The Rapid Appeals Process (RAP) is a pilot program announced by the IRS in 2026 under IR-2026-XX that provides an expedited Appeals conference for eligible cases. Under RAP, the Appeals officer will explain each side's litigation risks and focus on a settlement that takes those risks into account. The program is designed to resolve smaller cases more quickly than the traditional Appeals process, but it is currently a pilot and may be modified or discontinued."
          }
        }
      ]
    }
  ]
}

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