Notice CP11 - Return Changed
IRC Section: IRC § 6201
Response Deadline: 60 days
The IRS found a math error on your return, and now you owe money instead of getting a refund. This is a calculation correction — not an audit. The notice explains what they changed and the new amount you owe.
A CP11 is a math error notice that results in a balance due. The IRS found a calculation error on your return that changed your anticipated refund into a balance owed, or increased an existing balance. The notice explains the correction and the new amount due.
Common Triggers
- Math errors
- Missing schedules
- Credit disallowed
Resolution Steps
- Step 1: Review the changes carefully
- Step 2: Check if you agree with the adjustments
- Step 3: Contact us if you disagree
- Step 4: File an amended return if needed
- Step 5: Pay the additional tax or request a refund
Common Questions About CP11
- What if I disagree with the IRS's calculation changes in a CP11?
- Contact the IRS at the number on your notice within 60 days to explain the discrepancy or request a reversal. If you don't respond within 60 days, the assessment becomes final and collection can begin.
- Is a CP11 the same as an audit?
- No. A CP11 is an automated math error correction. An audit involves a human examiner reviewing your return line by line. The CP11 is much less serious but still results in a balance due.
Related Notices
Additional Resources
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