Challenging Audit Findings: Appeals and Litigation - Understanding Your Rights and Options

What Happens After the IRS Sends You an Audit Determination

When an IRS auditor finishes examining your return, they issue a 30-day letter (Letter 525 or Letter 950) with their proposed adjustments. You have 30 days from the date on that letter to either accept the changes, submit additional documentation, or formally protest. Doing nothing is the worst option — the IRS will issue a 90-day Statutory Notice of Deficiency (Letter 3219 or CP3219A) and assess the tax automatically if you let that window close.

For disputes under $25,000 in proposed tax per period, you can file a Small Case Request using Form 12203 by simply describing why you disagree. Above that threshold the IRS requires a formal written protest with each issue itemized, the facts supporting your position, the law you're relying on, and a perjury declaration.

Appeals, Tax Court, and Refund Litigation

If the 30-day window closes or you receive a Statutory Notice of Deficiency, your remaining option is U.S. Tax Court. You have 90 days from the date on the notice (150 days if you're outside the U.S.) to file a petition under IRC § 6213(a). Tax Court is the only venue that lets you contest the IRS's position without first paying the disputed tax.

Once a petition is filed, the case typically goes back to the IRS Office of Appeals before trial — most cases settle there. If the Appeals Officer can't reach agreement, you proceed to trial in front of a Tax Court judge. Alternatively, taxpayers who pay the disputed tax can sue for refund in U.S. District Court or the Court of Federal Claims, which sometimes produces a more favorable forum depending on the issue and circuit.

Missing the 90-day window doesn't end the road, but it limits your tools to audit reconsideration, an Offer in Compromise based on doubt as to liability, or a refund suit after payment.

Frequently Asked Questions

What is the role of an appeals officer in the appeals process?

An IRS appeals officer is an independent reviewer who is not part of the examination team that conducted your audit. Their job is to take a fresh look at the disputed issues, weigh the strength of each side's position, and try to reach a fair resolution based on the law and the hazards of litigation. Because the Appeals function is meant to be impartial, the officer can settle a case on terms an examiner cannot, but they still apply the same tax rules and expect you to support your position with documentation.

How long do I have to file an appeal after receiving an audit report?

After an audit, the IRS generally sends a 30-day letter that gives you 30 days to request a conference with the Office of Appeals by filing a written protest. If you miss that window, the IRS typically issues a statutory notice of deficiency, often called a 90-day letter, which gives you 90 days to petition the U.S. Tax Court. Deadlines are strict and depend on the specific notice you received, so check the dates on your letter carefully and consider speaking with a tax attorney before they pass.

Can I represent myself in tax litigation, or should I hire an attorney?

You are allowed to represent yourself in U.S. Tax Court, and the court has a simplified procedure for smaller disputes. That said, tax litigation involves rules of evidence, procedural deadlines, and burden-of-proof questions that can be difficult to handle without experience. Many taxpayers consult a tax attorney to evaluate whether their case is better resolved through settlement or trial and to understand the risks involved.

What happens if I accept the appeals officer's determination?

If you agree with the appeals officer's determination, you will usually sign a settlement agreement, such as Form 870-AD or a closing agreement, that documents the resolved amounts. Once signed, the agreement generally finalizes those issues and the IRS will assess any tax, penalties, and interest accordingly. Because a signed settlement can limit your ability to reopen the matter later, it is worth reviewing the terms closely before you agree.

Can I appeal a court decision in tax litigation?

Yes. A decision from the U.S. Tax Court can generally be appealed to the U.S. Court of Appeals for the circuit where you live, and in some situations further review by the U.S. Supreme Court is possible. Appeals to a higher court must be filed within set deadlines and typically focus on legal errors rather than re-arguing the facts. Given the complexity, taxpayers often consult an attorney to assess whether an appeal is worthwhile.

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This content was written and reviewed by the licensed tax attorneys at Victory Tax Lawyers, LLP. Our attorneys specialize in IRS tax relief and are licensed members of the California State Bar with a nationwide practice.

Last Reviewed: 2026  ·  Meet Our Attorneys →

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