What to do if the IRS changed your refund or denied it

If the IRS reduced your refund, denied it entirely, or you believe they made an error in calculating it, you have a formal path to challenge the decision. The IRS must notify you in writing when they change your refund — usually through a letter explaining what they found and why. You do not have to accept that decision. The dispute process depends on whether you filed electronically or on paper, how much money is involved, and whether you want to challenge the IRS's math or their interpretation of the tax law itself.

The first step is always to read the IRS letter carefully. It will tell you exactly what they changed and cite the tax code section they used. Many disputes are resolved simply by providing documentation the IRS did not have — receipts for deductions, proof of income, or evidence that a dependent truly lived with you. If you disagree with their reasoning rather than just their facts, you will need to go through the formal dispute process, which can take months.

Key Takeaways

  • The IRS sends a written notice explaining any refund reduction or denial, and that letter includes instructions for how to respond.
  • You have 30 days from the date on the IRS letter to file a formal protest if you want to dispute the decision through the IRS Office of Appeals.
  • For smaller disputes (under $25,000), you can use the simplified appeal process, which is faster and does not require a tax professional.
  • If you disagree with the IRS's legal interpretation rather than just the facts, you may need to go to Tax Court, which costs money to file but does not require you to pay the disputed amount first.
  • Gathering documentation before you respond — receipts, bank statements, proof of payment — makes your case stronger and can resolve the dispute without formal appeal.

Understanding the IRS letter and your response deadline

When the IRS changes your refund, they send a formal notice called a Notice of Proposed Adjustment or Notice of Deficiency. The letter will have a date at the top. You have exactly 30 days from that date to file a written protest if you want to challenge the decision through the IRS Office of Appeals. If you do nothing within 30 days, the IRS's decision becomes final and you lose the right to appeal inside the IRS system.

Read the letter for the specific reason they changed your refund. Common reasons include: the IRS says you claimed a dependent who does not meet the rules, you deducted expenses they say were not valid, you reported income they have a record of but you did not claim, or they found math errors on your return. The letter will cite the tax code section they used. Keep this letter — you will need it to file your protest.

If you are unsure whether you have 30 days or a different deadline, look for language like "You have 30 days from the date of this letter" or check the IRS website for the specific notice number printed on your letter. Some notices give you 60 days instead. The deadline is strict; if you miss it, you can still go to Tax Court, but you cannot use the IRS appeal process.

Gathering documentation before you file a protest

Before you formally dispute the decision, collect every piece of paper that supports your position. If the IRS says you did not earn the income you reported, gather pay stubs, W-2 forms, 1099 forms, or bank statements showing deposits. If they rejected a deduction, find receipts, invoices, credit card statements, or cancelled checks proving you paid for that expense. If they say a dependent does not may have access to, gather birth certificates, school enrollment records, or proof that the person lived with you (utility bills, lease, or school records with your address).

Organize these documents in the order they appear on your tax return. Make two copies — one for yourself and one to send to the IRS. Do not send originals; send copies only. If you have a lot of documents, number them and create a simple index so the IRS reviewer can find what they need quickly. The stronger your documentation, the more likely the dispute will be resolved in your favor without going to formal appeal.

Filing a formal protest with the IRS Office of Appeals

If you want to dispute the IRS decision through their internal appeal process, you must file a written protest within 30 days of the notice date. For disputes under $25,000, you can use the simplified appeal process, which requires less paperwork and moves faster than the formal process. You will file Form 12203, Request for Appeals Conference, along with a brief written statement explaining why you disagree with the IRS decision.

Your statement should be clear and organized. Start by listing the specific items the IRS changed. Then, for each item, explain why you believe the IRS was wrong — either because you have new documentation, because you believe their interpretation of the tax law is incorrect, or because you think they misunderstood the facts. Keep it to one or two pages. Attach copies of your supporting documents in the order you reference them in your statement.

Mail your protest and documents to the IRS office address shown in your notice letter. Send it certified mail with return receipt so you have proof of delivery. The IRS will assign your case to an appeals officer, who will review your documents and may contact you to discuss the case. This process typically takes two to four months. The appeals officer is independent from the IRS office that made the original decision, so they will look at your case with fresh eyes.

When to use the formal appeal process instead

If your dispute involves more than $25,000, or if you want a more thorough review, you can request the formal appeal process instead of the simplified one. This requires more detailed paperwork — you will need to file Form 12203 along with a detailed written protest that explains the facts, the law, and why you believe the IRS was wrong. You may also need to include affidavits or expert opinions if the dispute involves complex tax issues.

The formal process takes longer — usually four to six months or more — but it gives you a more complete hearing. You can request a conference with the appeals officer in person or by phone. If you have a tax professional or attorney, they can represent you in the formal appeal process. The appeals officer will issue a written decision explaining their reasoning, which you can use if you decide to go to Tax Court later.

Going to Tax Court if the IRS appeal does not work

If the IRS Office of Appeals upholds the original decision, or if you want to skip the appeal process entirely, you can file a case in U.S. Tax Court. You have 90 days from the date of the IRS's Notice of Deficiency to file in Tax Court. This is a real court, and you will need to file formal legal documents. Tax Court has a simplified procedure for smaller cases (under $50,000), which does not require you to hire an attorney, though many people do.

The advantage of Tax Court is that you do not have to pay the disputed amount before you file. With other courts, you must pay the IRS first and then sue to get your money back. The disadvantage is that you must file within 90 days of the Notice of Deficiency, and you will need to follow court rules for filing documents and presenting evidence. If you lose in Tax Court, you can appeal to the U.S. Court of Appeals, but that is expensive and time-consuming.

Disputes over math errors versus disputes over tax law

The IRS distinguishes between math errors and substantive disputes. A math error is when the IRS says you added wrong, claimed a dependent twice, or made a calculation mistake. A substantive dispute is when you disagree about whether an expense is deductible, whether someone qualifies as your dependent, or how a tax rule applies to your situation. The process is different for each.

For math errors, the IRS can correct them without sending you a Notice of Deficiency first. If you believe the IRS made a math error, you can request that they recalculate on Form 1040-X, Amended U.S. Individual Income Tax Return. For substantive disputes, you must go through the protest and appeal process described above. If you are unsure whether your dispute is a math error or a substantive one, the IRS letter will usually make that clear.

What happens while your dispute is pending

While your protest or appeal is being reviewed, the IRS will not take collection action against you for the disputed amount — they will not garnish your wages, levy your bank account, or place a lien on your property. However, interest continues to accrue on the disputed amount. If you ultimately lose the dispute, you will owe the original amount plus interest calculated from the original due date of your return.

If you need the money urgently and do not want to wait for the appeal process, you can request a stay of collection, which temporarily stops the IRS from collecting while your case is pending. You can also ask for an installment agreement, which lets you pay the disputed amount in monthly payments while your appeal is ongoing. Neither of these stops interest from accruing, but they give you breathing room if you cannot pay the full amount right away.

Frequently Asked Questions

Can I dispute a refund if I already cashed the check?

Yes. If the IRS later discovers an error on your return — such as a dependent who does not may have access to or an inflated deduction — they can reclaim the refund even after you have spent it. They will send you a notice explaining what they found. You can dispute that notice using the same process described above, even though you no longer have the money.

What if I disagree with the IRS but cannot afford a tax attorney?

You do not need an attorney to file a protest or use the simplified appeal process. Many people represent themselves successfully by organizing their documents clearly and writing a straightforward explanation of why they disagree. If you cannot afford an attorney and your income is below a certain threshold, you may be able to get free help from a Low Income Taxpayer Clinic, which the IRS funds in most areas.

How long does it take to get a decision on my dispute?

The simplified appeal process usually takes two to four months. The formal appeal process takes four to six months or longer. Tax Court cases vary widely depending on the court's schedule and the complexity of your case — anywhere from six months to two years. During this time, interest continues to accrue on the disputed amount.

What if the IRS says I owe money instead of getting a refund?

The same dispute process applies. You have 30 days from the notice date to file a protest. If you disagree that you owe the amount, you can go through appeals or Tax Court. The difference is that you are fighting to reduce or eliminate a debt rather than recover a refund, but the legal process is identical.

Can I dispute a refund that was offset to pay a debt?

Yes, but you will need to dispute the original reason the IRS reduced your refund. If your refund was offset to pay back taxes, student loans, or child support, you can challenge whether that debt was valid or whether the offset was applied correctly. You will need to file a protest within 30 days of the offset notice. Some offset situations have their own dispute procedures, so check the notice carefully for specific instructions.