You appeal an examination by filing a written protest with the IRS office identified in the 30-day letter, within the period that letter specifies, stating each adjustment you dispute, the facts supporting your position, and the legal authority you rely on.

Three points control the outcome. First, the deadline in the letter is the one that matters; a general rule you read elsewhere does not override it. Second, a protest that says the taxpayer disagrees, without identifying each adjustment and supporting each factual assertion, is not an appeal in any functional sense. Appeals cannot evaluate an assertion it cannot verify. Third, the protest goes to the examining function first, not to Appeals. The examiner reviews it, and may concede, develop the matter further, or write a rebuttal before the file moves.

The 30-Day Letter

When an examination closes unagreed, the IRS issues a letter transmitting the examination report and an explanation of the proposed adjustments, often including Form 886-A, and granting the right to request Appeals consideration. It is commonly called a 30-day letter because it typically allows 30 days to respond.

A 30-day letter is not a notice of deficiency. It does not start the Tax Court petition clock. Nothing has been assessed. If you do nothing, the IRS will ordinarily issue a statutory notice of deficiency, which does start that clock.

Read the letter for the response date, the periods covered, and the office and address for submission. If additional time is needed, request it from the examiner before the date passes. Extensions are frequently granted and are not automatic.

Formal Protest or Small Case Request

Publication 5 sets out the threshold. A formal written protest is generally required when the proposed change to the total amount of tax and penalties for any tax period exceeds $25,000. If more than one period is involved and any period exceeds that amount, the formal protest applies to all periods. A small case request may be available where the total for each period is $25,000 or less.

A formal written protest is also required, regardless of amount, in employee plan, exempt organization, partnership, and S corporation cases.

Different proceedings use different instruments. A Collection Due Process hearing is requested on Form 12153 under I.R.C. section 6320 or 6330. A rejected offer in compromise, a Collection Appeals Program matter, and an innocent spouse determination each follow their own procedure. The notice you received identifies the route.

What Belongs in the Protest

Publication 5 states the minimum: identify the taxpayer and periods, list the disputed issues and proposed changes, explain why you disagree, state the facts and law supporting your position, and include the penalties-of-perjury declaration and signature applicable to the taxpayer or representative.

Those are the formal requirements. They are not the standard for an effective protest. For each disputed adjustment, the document should state:

The issue, framed as a question that identifies the legal element in dispute. "The IRS improperly disallowed the deduction" tells Appeals nothing. "Whether the $412,000 expenditure to replace the roof membrane is currently deductible under I.R.C. section 162 or must be capitalized under section 263 and Treas. Reg. section 1.263(a)-3" defines the research question, the relevant facts, and the burden.

The amount and period.

The government's position, stated accurately.

The taxpayer's requested disposition.

The material facts, each traceable to a document, a witness declaration, a return, or a transcript, with the exhibit identified.

The governing authority, in hierarchical order: statute, regulation, controlling appellate decision, Tax Court or other trial-court precedent, then published administrative guidance.

Application of that authority to those facts.

The contrary authority, addressed rather than omitted.

The requested result.

Disputed Facts and Disputed Law Require Different Presentations

This distinction determines how the protest should be built.

A factual dispute is won with evidence and lost with adjectives. If the question is whether a payment was for services actually rendered, the protest should identify the engagement letter, the invoices, the wire confirmations, the deliverables, and the person who can testify to the work. It should not assert that the payment was "reasonable" and "necessary." Those are legal conclusions dressed as facts, and Appeals will discount them.

A legal dispute is won by demonstrating that the authorities govern, and by explaining why the government's construction should not control. The forum matters. Under Golsen v. Commissioner, 54 T.C. 742 (1970), aff'd, 445 F.2d 985 (10th Cir. 1971), the Tax Court follows a squarely on-point decision of the court of appeals to which the case would be appealable. A Second Circuit decision is not controlling for a Virginia taxpayer, however favorable it is.

Mixed issues, which most are, require both. A reasonable compensation dispute needs the comparability evidence and the board records, and it needs the legal framework the courts in the relevant circuit apply.

Partial Disagreement

You are not required to dispute everything. Agreeing to adjustments that are correct and protesting the rest is ordinarily the stronger course. It narrows the controversy, signals that the positions taken are considered rather than reflexive, and lets Appeals focus on issues that are genuinely in dispute.

Two mechanical cautions. Confirm how a partial agreement affects the computations, because conceded adjustments frequently change the numbers on the contested ones. And confirm what any agreement form you sign actually closes, and for which periods.

Adverse facts deserve the same treatment. Appeals will have the examination file. A protest that omits an obvious unfavorable document loses credibility without eliminating the problem. Identify it, explain its evidentiary weight, and distinguish the inference the government draws from it.

Alternatives to Filing a Protest

Before filing, consider whether an alternative administrative route fits the case better.

Fast Track Settlement allows a mediated resolution while the case is still in Examination's jurisdiction, using an Appeals official as a facilitator. Rev. Proc. 2003-40 established the program for what was then LMSB, now the Large Business and International division; Rev. Proc. 2017-25 established it for SB/SE taxpayers. Fast Track is most useful when factual development is complete and the parties are separated by valuation, characterization, or a similar issue susceptible to facilitated negotiation.

Announcement 2025-6 modified these programs through January 15, 2027. Fast Track may now be requested for one or more issues rather than requiring the entire case to qualify; prior Fast Track participation no longer bars a later Post Appeals Mediation request; a formal denial requires first-line executive approval and a written explanation; and a Last Chance Fast Track pilot provides that when a taxpayer files a protest in response to a 30-day or equivalent letter in an SB/SE examination, the group manager will ask Appeals to contact the taxpayer about the Fast Track option. That last item is a notification mechanism triggered by the protest, not an independent right of entry.

Early referral under Rev. Proc. 99-28 transfers a developed but unagreed issue to Appeals while Examination continues developing other issues. It is useful where resolving one issue may narrow what remains.

None of these extends the protest deadline in your letter.

If Appeals Does Not Resolve the Case

Appeals may concede, the taxpayer may concede, the parties may settle some issues, or the case may close unagreed.

In a deficiency case that closes unagreed, the IRS issues a statutory notice of deficiency under I.R.C. section 6212. That notice starts a strict period, generally 90 days, or 150 days if the notice is addressed to a person outside the United States, in which to petition the United States Tax Court under section 6213(a). Filing a timely petition prevents assessment and collection while the case is pending and allows the dispute to be litigated without paying first.

The alternative forum is refund litigation in a federal district court or the Court of Federal Claims, which generally requires full payment of the assessed liability first. Flora v. United States, 362 U.S. 145 (1960). A timely refund claim under section 6511 and the limitations period of section 6532(a) apply.

Note that filing a Tax Court petition generally forecloses a later refund suit for the same year. I.R.C. section 6512(a). The choice of forum is a real choice, and it should be made deliberately.

For a detailed discussion of what happens at the Appeals conference and how Appeals evaluates cases, see What Happens During an IRS Appeals Conference?. For comprehensive guidance on drafting an effective protest document, see How to Prepare an IRS Appeals Protest.

Mistakes That Weaken an Appeal

Missing the deadline in the letter. Everything downstream is harder. Request an extension before the date, not after.

Failing to identify each adjustment separately. A protest that argues generally that the examination was wrong forces Appeals to reconstruct the taxpayer's theory from the file. Some of it will not be reconstructed.

Asserting facts without support. Every material factual proposition should point to something. Unsupported assertions are treated as argument, and argument does not carry a burden of proof.

Ignoring contrary authority. Appeals researches the issue independently. Failing to address a significant adverse case does not conceal it; it signals either that counsel did not find it or chose not to mention it.

Treating the protest as a complaint about the examiner. The question before Appeals is whether the proposed adjustment is correct. Procedural irregularities should be raised where legally relevant. Frustration with the examination should not.

Saving evidence for Appeals. Appeals is a settlement function and generally does not develop new evidence. Material documents introduced for the first time at Appeals frequently produce a referral back to the examining function and delay, not advantage.

Forgetting the assessment statute. Appeals generally will not accept a nondocketed examination case with fewer than 365 days remaining on the assessment statute. IRM 8.20.5.3.1.1. Whether to sign a consent under I.R.C. section 6501(c)(4) may determine whether Appeals consideration is available at all.

Confusing the administrative deadline with the litigation deadline. Discussions with the IRS do not extend the period to petition the Tax Court once a notice of deficiency has issued.

What Happens During an IRS Appeals Conference? · How to Prepare an IRS Appeals Protest · When Should You Hire a Tax Attorney for an IRS Audit? · What Happens If You Miss the Tax Court 90-Day Deadline?

If you have received a 30-day letter, the protest deadline and the assessment statute should both be calendared before anything else is decided. Chase Counsel accepts selected federal tax controversy engagements, including the preparation of administrative protests. Learn more at www.ChaseCounsel.Com/federal-tax-controversy.

This article discusses federal tax procedure generally and is not legal advice for any particular taxpayer. Appeal rights, deadlines, and available procedures depend on the notice received and the type of controversy.