1. Identify Your IRS Notice before Filing a Tax Appeal
The notice determines your next step. An audit adjustment, a penalty relief denial, and a proposed levy involve different rights, even when they concern the same tax year.
Match the Notice to the Correct Response
Check the notice’s mailing date, tax periods, disputed amounts, and filing instructions. Preserve the complete notice and envelope.
| Notice or Decision | Initial Response | Filing Deadline |
|---|---|---|
| Audit letter offering Appeals review | Written protest or eligible Small Case Request | Usually 30 days; follow the letter |
| Notice of Deficiency | Petition U.S. Tax Court | Generally 90 days; 150 days when addressed to a person outside the United States |
| Notice offering a CDP hearing | Form 12153 | Follow the deadline stated in the notice |
| Penalty abatement rejection | Request Appeals review | Usually 30 days; follow the rejection letter |
Audit letter offering Appeals review
- Initial ResponseWritten protest or eligible Small Case Request
- Filing DeadlineUsually 30 days; follow the letter
Notice of Deficiency
- Initial ResponsePetition U.S. Tax Court
- Filing DeadlineGenerally 90 days; 150 days when addressed to a person outside the United States
Notice offering a CDP hearing
- Initial ResponseForm 12153
- Filing DeadlineFollow the deadline stated in the notice
Penalty abatement rejection
- Initial ResponseRequest Appeals review
- Filing DeadlineUsually 30 days; follow the rejection letter
These responses are not interchangeable. An IRS protest does not replace a Tax Court petition, and a collection hearing does not automatically reopen the underlying tax assessment.
2. Prepare Your IRS Appeals Request
Your request should explain what the IRS got wrong and connect that explanation to supporting records. In tax disputes, a clear calculation and a relevant document are more useful than a general statement that the assessment is unfair.
Choose a Formal Protest or Small Case Request
For eligible audit disputes, a Small Case Request may be available when proposed additional tax and penalties total $25,000 or less for each tax period. Partnerships, S corporations, employee plans, and exempt organizations do not qualify.
Otherwise, follow the formal protest requirements in the letter and Publication 5. Include the disputed items, relevant facts, legal grounds, and required signed declaration. Send the request to the address specified in the IRS letter, rather than directly to Appeals.
Organize Evidence Around Each Disputed Item
Separate adjustments you accept from those you challenge. For each disputed item, provide:
- The IRS adjustment and your proposed correction.
- Returns, ledgers, invoices, or payment records supporting that correction.
- The applicable legal rule and how it fits the facts.
Label attachments and explain calculations. Keep a complete submission copy and proof of timely mailing or delivery.
3. Handle Penalty Relief and Collection Separately
A dispute over tax liability does not automatically resolve a penalty or stop collection. Identify the relief you need for each issue and use the procedure that applies to that decision.
Appeal a Penalty Relief Denial
An IRS penalty abatement appeal should address the reason the IRS rejected relief. Depending on the penalty, relevant grounds may include reasonable cause, a statutory exception, or an administrative waiver.
For tax penalties, explain what happened, when it happened, and what steps you took to comply. Support that timeline with records. Relief standards vary, and inability to pay alone generally does not establish reasonable cause.
Understand the Difference between CDP and CAP
A timely Collection Due Process request generally suspends levy action for the tax periods involved, subject to exceptions, and preserves access to Tax Court review. A late request may qualify for an equivalent hearing, which generally does not provide that judicial review right.
CDP also limits challenges to the underlying liability when the taxpayer received a notice of deficiency or previously had an opportunity to dispute it.
The Collection Appeals Program addresses various collection actions and usually proceeds quickly. Its decision does not carry the same right to Tax Court review. When responding to an IRS levy, confirm which procedure your notice offers.
Account for Interest during the Appeal
An appeal generally does not stop interest on unpaid tax. Even when levy action is suspended, interest may continue to accrue. Review payment or deposit options separately, including how each could affect your litigation route.
4. Preserve Your Right to Court Review
Court access depends on the determination, deadline, and filing prerequisites. The disputed amount may influence litigation costs, but it does not alone determine which court can hear the case.
Petition Tax Court before the Deficiency Deadline
A timely deficiency petition generally permits review without first paying the disputed deficiency. File with Tax Court, rather than sending the petition to the IRS.
Keep tracking the filing deadline while the IRS reviews documents or discusses settlement. Those discussions do not extend the deficiency petition period. A CDP determination has a separate, generally 30-day, Tax Court petition deadline.
Meet the Prerequisites for Refund Litigation
Refund litigation generally requires full payment and a timely administrative refund claim before suit in a U.S. .istrict court or the U.S. Court of Federal Claims. Certain divisible taxes have exceptions to full payment.
A taxpayer generally must wait six months after filing the refund claim unless the IRS decides it sooner. A mailed notice disallowing the claim generally starts a two-year lawsuit period. For corporate tax refunds, track the administrative claim deadline separately from the deadline to sue.
5. Frequently Asked Questions
Representation and missed administrative deadlines raise additional questions. The answers depend on the stage of the dispute and the notices already issued.
Yes. An attorney, CPA, or enrolled agent authorized to practice before the IRS may represent you. Form 2848 generally authorizes representation for specified tax matters and periods. Representation in Tax Court requires separate admission to that court.
Missing the administrative response deadline does not necessarily eliminate every remedy. A later Notice of Deficiency may provide a separate opportunity to petition Tax Court. Check the current notice immediately; a late protest does not restore or extend a court deadline.
04 Mar, 2026
