To appeal an IRS decision, send a written request to the IRS Independent Office of Appeals within the deadline printed on the letter you received, using a small case request if the disputed tax, penalties, and interest for each period total $25,000 or less, or a formal written protest if any period exceeds that amount. If Appeals can’t resolve the dispute, you can then file a petition in U.S. Tax Court after the IRS issues a Notice of Deficiency. The path starts with the letter in your hand and the calendar date it was mailed.
Which IRS Decisions Appeals Will Review
The Office of Appeals hears disputes over proposed audit adjustments, employment tax assessments, penalties, denied refund claims, and collection actions such as liens and levies. Once the examiner or collection officer finishes and you still disagree, the case can move to an Appeals Officer who had no role in the original decision.1Internal Revenue Service. What to Expect From the Independent Office of Appeals
The most common trigger is Letter 525, the 30-day letter, which arrives with a report showing the changes the IRS wants to make and the amounts involved.2Internal Revenue Service. Letters and Notices Offering an Appeal Opportunity Ignore it and the IRS will issue a Statutory Notice of Deficiency (the 90-day letter), which shifts you out of the administrative track and into a stricter Tax Court timeline.3Taxpayer Advocate Service. Letter 525 Audit Report/Letter Giving Taxpayer 30 Days to Respond
One boundary worth naming: Appeals Officers will not consider arguments that taxes are voluntary, that wages are not income, or similar frivolous positions. The Tax Court can impose a penalty of up to $25,000 on a taxpayer whose position is frivolous or whose case was filed primarily for delay.4Office of the Law Revision Counsel. 26 USC 6673 – Sanctions and Costs Awarded by Courts Stay with factual disputes and legitimate readings of the tax code.
Small Case Request or Formal Protest
The dollar amount decides how much paperwork you file. If total tax, penalties, and interest for each period is $25,000 or less, you can submit a small case request: a brief written statement asking for an appeals conference and explaining which changes you disagree with and why.5Internal Revenue Service. Appeals Process No required format, no sworn declaration.
If any period exceeds $25,000, a formal written protest is required for all periods. The two paths differ sharply in effort. A small case request can be drafted in an afternoon; a formal protest asks for structured legal argument and a signed penalty-of-perjury statement.
What a Formal Written Protest Must Include
- Your full name, address, daytime phone number, and taxpayer identification number.
- A clear statement that you want to appeal the IRS findings to the Office of Appeals.
- A copy of the IRS letter proposing the adjustments.
- Every tax period you are disputing.
- Each proposed change you contest, with your reasons.
- The facts supporting your position.
- The tax code sections, regulations, or other legal authority you rely on, if any.
- A signed perjury statement: “Under the penalties of perjury, I declare that I examined the facts stated in this protest, including any accompanying documents, and, to the best of my knowledge and belief, they are true, correct, and complete.”
If a representative signs on your behalf, the perjury language changes depending on whether that person has firsthand knowledge of the facts.5Internal Revenue Service. Appeals Process
Gather your evidence before you draft. Bank statements, canceled checks, mileage logs, receipts, and any other records that contradict the IRS findings are the backbone of the argument. Match each disputed item to specific documentation.
Appealing a Lien or Levy: The CDP Hearing
Collection actions follow a different track. If you receive a notice of federal tax lien filing or a final notice of intent to levy, you have 30 days to request a Collection Due Process hearing using Form 12153. Explain why the collection action is inappropriate and propose an alternative — usually an installment agreement or an offer in compromise. Appeals will need a financial statement, Form 433-A for individuals or Form 433-B for businesses, so send one with the request to avoid delays.6Internal Revenue Service. Collection Due Process (CDP) FAQs
A limitation: in a CDP hearing, you can challenge the underlying tax only in narrow circumstances, such as when you never received a notice of deficiency or otherwise had no prior chance to dispute the liability.7Taxpayer Advocate Service. Form 12153 Taxpayer Requests: CDP/Equivalent Hearing
Where to Send It and When
Send the protest or small case request to the IRS office address on the letter you received, not to a general processing center. The deadline is spelled out in the letter, typically 30 days from the date printed on it.
Use certified mail with return receipt requested. That receipt is your proof of timely delivery if the IRS later questions when you responded. Keep a full copy of everything you send. If the deadline falls on a Saturday, Sunday, or legal holiday in the District of Columbia, a filing postmarked the next business day is treated as timely.8Internal Revenue Service. Publication 509 (2026), Tax Calendars The IRS will send an acknowledgment letter confirming the file has been transferred to the local appeals office. That can take several weeks.
Stopping the Interest Clock While You Wait
Interest on unpaid tax does not pause during an appeal. The IRS charges interest on underpayments whether or not you are disputing the amount. As of early 2026, the underpayment rate for individuals is 7% per year, compounded daily.9Internal Revenue Service. Quarterly Interest Rates On a $20,000 disputed balance, that is roughly $1,400 per year accruing while the case sits.
You can stop interest without giving up the appeal by making a cash deposit under IRC 6603. Send a payment with a written statement designating it as a deposit (not a payment of tax) and identifying the tax type and year. If a deficiency is later assessed, the deposit offsets what you owe and stops interest on that portion. If you win, the IRS returns the deposit with interest. The written designation is essential; without it, the IRS treats the money as a tax payment, which has different legal consequences.
The Appeals Conference
An Appeals Officer independent of the original examiner reviews the case. You can participate by phone, video, in writing, or in person. The conference is informal.
The officer evaluates what the IRS calls the “hazards of litigation” — an assessment of how the case would fare if it went to Tax Court. If your documentation and legal position are strong, the officer has authority to settle. Mixed evidence often produces a partial agreement in which some adjustments stand and others are reduced or dropped.
You have the right to make an audio recording of any in-person conference. Under IRC 7521, the IRS must allow you to record if you give advance notice, typically at least 10 days before the meeting. The IRS may also record if it gives you the same notice.
Most cases end in a settlement. If you agree, you sign a closing document such as Form 870, which waives certain restrictions and lets the IRS assess the agreed amount. Form 870 is not a final binding settlement in the way many taxpayers expect: the IRS retains the right to later determine that you owe additional tax for the same period.10Internal Revenue Service. Waiver of Restrictions on Assessment and Collection of Deficiency in Tax and Acceptance of Overassessment Once you sign, you generally cannot contest the agreed amounts in Tax Court unless the IRS proposes new deficiencies.11Internal Revenue Service. 25.6.22 Extension of Assessment Statute of Limitations by Consent
If Appeals Doesn’t Resolve It: Tax Court
When Appeals can’t reach a settlement, or if you skip the administrative track, the IRS issues a Statutory Notice of Deficiency — the 90-day letter — which is the legal trigger for filing in Tax Court.12Legal Information Institute. 90-Day Letter You have 90 days from the mailing date on the notice to file the petition. If you are outside the United States, you get 150 days.13Internal Revenue Service. 4.8.9 Statutory Notices of Deficiency
Treat that deadline as absolute. Courts have historically refused to extend it. Miss the window and the IRS assesses the tax immediately; your only remaining option is to pay the full amount and file a claim for refund.
The filing fee is $60, payable online, by mail, or in person at the court in Washington, D.C.14United States Tax Court. Court Fees Your petition must identify the errors you believe the IRS made and the facts supporting your position. Tax Court lets you challenge the deficiency without paying the disputed tax first, which is the main reason most taxpayers choose it over district court or the Court of Federal Claims.
The Small Tax Case Election
If the amount in dispute is $50,000 or less for any single tax year, you can elect the small tax case procedure, sometimes called an “S case.” These cases use simplified rules, move faster, and do not require the formal rules of evidence.15Office of the Law Revision Counsel. 26 USC 7463 – Disputes Involving $50,000 or Less Many taxpayers handle S cases without a lawyer.
The tradeoff is finality. A small tax case decision cannot be appealed by either side. It becomes final 90 days after entry.16Office of the Law Revision Counsel. 26 USC 7481 – Date When Tax Court Decision Becomes Final If the case involves a novel legal question or a potential precedent, the regular procedure preserves your right to appeal to the U.S. Court of Appeals.
Handling the Appeal Yourself or Hiring a Representative
You can represent yourself throughout the process. You can also appoint an attorney, certified public accountant, or enrolled agent authorized to practice before the IRS.17Internal Revenue Service. Preparing a Request for Appeals
To authorize a representative, file Form 2848, Power of Attorney and Declaration of Representative. The form requires the representative’s name, address, and CAF number, along with the specific tax matter and periods. General language like “all years” or “all periods” is not accepted; the IRS will return the form. You must sign Form 2848 by hand if submitting by mail or fax, and the representative must sign within 45 days of your signature, or 60 days if you live abroad. Up to two representatives can be designated to receive copies of IRS notices on your behalf.
For a straightforward dispute at a small dollar amount, the small case request process is designed for taxpayers to use without professional help. For larger amounts, or when the argument depends on interpreting the code, hiring an authorized representative is often worth the cost.