Ask Maxi · IRS letters

I got a CP59 from the IRS. What does it mean?

Answered by our team at Taximum · Reviewed by Sandie Kersten, 24 years in tax and accounting · October 16, 2026

What to do depends on where things stand:

• If you filed within the last eight weeks, you do not need to do anything yet.
• If you filed earlier than that, check that the name, Social Security number and tax year on the notice match your return. Send a signed and dated copy, and make sure the return was not rejected when it was e-filed.
• If you have not filed, file now, or explain why you were not required to.
• If you believe the IRS made a mistake, you can respond on Form 15103.

Why it matters: if you owe, penalties and interest keep growing until the return is filed and the tax is paid. If you were owed a refund, there is a strict time limit to claim it, generally three years from the original due date.

If the IRS does not hear from you, it can prepare a return for you using only the income it knows about, with none of your deductions or expenses. That version almost always shows a higher balance than a return you file yourself.

Behind on more than one year? That is a common situation, and it is fixable one year at a time.

Send us a photo of the first page of the notice. We will tell you what it means for you and what to do next.

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