What happens when you disagree with the IRS about your refund

If the IRS reduced your refund, denied it entirely, or sent you less than you expected, you have the right to challenge that decision. The IRS must explain why in writing — usually in a letter that arrives weeks or months after you filed. That letter is your starting point, because it tells you which of three dispute paths to take and what important date you're working with.

The process depends on whether the IRS made a math error, disallowed a deduction or credit you claimed, or flagged something about your identity or income. Each path has different timelines and different people you'll deal with. Most disputes don't require a lawyer, but understanding which documents the IRS wants and which office handles your type of case will save you months.

Key Takeaways

  • The IRS letter explaining why your refund was reduced or denied tells you which dispute process applies and when your important date is.
  • straightforward math errors can be corrected by calling the IRS or sending a written response; complex disputes go to the IRS Appeals Office or Tax Court.
  • You have 30 days from the date on the IRS letter to request consideration by Appeals, or you lose that option and must go to Tax Court instead.
  • Gathering copies of the documents you originally filed (your tax return, receipts, bank statements, W-2s) before you respond will speed up the process.
  • If you disagree with the Appeals decision, you can take the case to Tax Court, but you must file within the important date stated in the Appeals letter.

Understanding the IRS letter that started the dispute

The IRS sends a letter called a Notice of Proposed Adjustment or Notice of Deficiency when it changes your return. Read it carefully, because it contains your important date and tells you what the IRS thinks you did wrong. The letter will say something like "we disallowed your home office deduction" or "we found unreported income" — that description matters, because it determines which office handles your dispute.

The letter includes a specific dollar amount the IRS says you owe or the refund reduction it's making. It also lists the tax year in question and the reason code for the change. Keep this letter; you'll need it to prove you're disputing the right case. Write down the date the letter arrived, because your 30-day window to request Appeals starts from that date, not from when you open the envelope.

If you don't understand what the letter says, the IRS has a phone number on it. You can call and ask for a plain-language explanation of which deduction was disallowed or which income was added. This is free and doesn't commit you to anything.

Correcting math errors and straightforward mistakes

If the IRS made an arithmetic error — adding up your numbers wrong, using the wrong tax bracket, or misreading a number from your return — you can often get it fixed without going through the formal dispute process. Call the IRS at the number on your letter and explain the error. Have your original return and the IRS letter in front of you. If the agent agrees it's a math mistake, they can correct it on the spot, and you'll receive a corrected notice within weeks.

If you prefer to write instead of call, send a letter to the IRS office that issued the notice. Include a copy of the letter, a copy of your original return, and a one-paragraph explanation of the math error. For example: "Line 12 of my return shows $5,400 in W-2 income. Your letter shows $54,000. This appears to be a transcription error." Send it certified mail so you have proof of delivery. The IRS will respond in writing within 30 to 60 days.

Requesting consideration by the IRS Appeals Office

If the IRS disallowed a deduction, denied a credit, or added income you disagree with — not a math error, but a judgment call about what's allowed — you can request that the IRS Appeals Office review the case. This is a separate office from the one that made the original decision, and the people there are trained to negotiate. You have 30 days from the date on the IRS letter to request this.

To request Appeals, send a letter to the IRS office listed on your notice. The letter should say: "I request consideration by the Appeals Office" and include your name, address, the tax year, and a brief explanation of why you disagree. For example: "I claimed a home office deduction of $3,200. The IRS disallowed it, but I have documentation showing I used one room exclusively for my business." Attach copies (not originals) of the documents that support your position — receipts, photos, lease agreements, whatever proves your point.

Send this by certified mail. The IRS will acknowledge receipt and assign an Appeals Officer to your case. This process typically takes two to four months. During that time, you and the Appeals Officer can exchange documents and have a phone conversation or in-person meeting to discuss your case.

Taking your case to Tax Court

If you disagree with the Appeals decision, or if you don't request Appeals within 30 days, you can file a case in Tax Court. This is a federal court that handles only tax disputes. You do not have to have a lawyer, and many people represent themselves. However, Tax Court has strict rules about important date and paperwork, so read the instructions carefully.

To file in Tax Court, you must send a petition to the court within 90 days of the date on the IRS's final letter (the one saying Appeals upheld the original decision, or the Notice of Deficiency if you skipped Appeals). The petition is a formal document that states your name, address, the tax year, the amount in dispute, and your argument for why the IRS is wrong. You can find the petition form and instructions on the Tax Court website (ustaxcourt.gov). Filing costs $60.

Once you file, the IRS will respond with its own documents. You'll exchange evidence with the IRS, and then either have a trial (in person or by video) or submit your case on paper for the judge to decide. Tax Court cases usually take one to two years from filing to decision. If you win, the IRS must refund the money or reduce what you owe. If you lose, you can appeal to a higher court, but that's rare and expensive.

Gathering documents before you respond

Whether you're correcting a math error, requesting Appeals, or filing in Tax Court, you'll need to prove your position. Start by collecting copies of everything you filed with your original return: your Form 1040, all schedules, receipts for deductions, W-2s, 1099s, and any other documents you attached. If you filed electronically, you can read a copy from the IRS website using your login at irs.gov, or request a transcript by phone.

Next, gather documents that support the specific item the IRS disputed. If they disallowed a home office deduction, collect photos of the space, your lease or mortgage statement showing the square footage, and utility bills. If they added unreported income, find bank statements or 1099s showing where the money came from. If they denied a dependent, gather the child's birth certificate and proof of residency. The more specific your evidence, the stronger your case.

Organize these documents in a folder or binder in the order they'll be reviewed — usually chronological or by category. Make copies for yourself, the IRS, and the Appeals Officer or court. Label each document clearly. This takes time, but it prevents delays and shows the IRS or court that you're serious about your position.

What to expect during the dispute process

After you request Appeals or file in Tax Court, the IRS will send you acknowledgment letters and ask for additional information if needed. Respond to every request within the important date stated in the letter — usually 30 days. If you miss a important date, you may lose your right to dispute.

If you're in Appeals, the Appeals Officer may call you to discuss the case informally. This is not a trial; it's a conversation. Be honest, stick to the facts, and bring your documents. If the Appeals Officer agrees with you on part of the case, they may offer a settlement — the IRS concedes some of the disputed amount and you concede the rest. You can accept or reject the settlement and proceed to Tax Court.

If you're in Tax Court, you'll receive a trial date or instructions for submitting your case on paper. If you choose a trial, you'll present your evidence and answer questions from the judge. The IRS will do the same. The judge will issue a written decision weeks or months later.

Frequently Asked Questions

Do I have to pay the disputed amount while I'm fighting the IRS?

No. If you request Appeals within 30 days of the IRS letter, you don't have to pay until the Appeals process is finished. If you file in Tax Court, you don't have to pay while the case is pending. However, interest continues to accrue on any amount the IRS ultimately says you owe.

Can I represent myself in Tax Court, or do I need a lawyer?

You can represent yourself. Many people do, especially in cases involving smaller amounts. However, Tax Court has strict rules about evidence and procedure. If the amount in dispute is large or the case is complex, a tax attorney or CPA can help. Some offer free initial consultations.

What if I can't find the documents the IRS is asking for?

Explain that in writing. If you can't find a receipt, provide other evidence — a bank statement showing the payment, a credit card bill, a photo, or a written statement from the vendor. The IRS understands that old documents get lost. What matters is that you make a reasonable effort to prove your case.

How long does the whole dispute process take?

Correcting a math error takes 30 to 60 days. Appeals takes two to four months. Tax Court takes one to two years. The timeline depends on how busy the office is and how complex your case is. You can ask for a status update at any time.

What happens if I win my dispute?

The IRS will issue a refund for the amount you won, plus interest. If you're in Appeals and win part of the case, you'll get a refund for that portion. If you're in Tax Court and win, the judge's decision is final, and the IRS must comply within a set timeframe.