Reviewed by Main AI · Updated July 2026
A CP11 means the IRS corrected an error on your return and the change results in a balance due. You generally have 60 days from the notice date to dispute the correction before it becomes final.
A CP11 tells you the IRS changed something on your return — a math error, a mismatched figure — and after the correction, you owe money. The notice explains what was changed and the new balance. Critically, you generally have 60 days to contact the IRS if you disagree; respond in that window and you can get the change reversed or explained without formal amendment. Agree with the correction? Just pay or set up a plan. Disagree and stay silent? The assessment stands and collection notices begin. Check their math first — the IRS is right often, but not always.
Contact the IRS within 60 days of the notice with documentation. A timely response can reverse the change without filing an amended return.
No — it’s a correction notice, usually from a math or matching error, not an examination of your whole return.
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