IRS Notice CP21A: Changes you requested — you owe
Quick answerThe IRS made the changes you asked for (often on an amended return) and, as a result, you owe a balance.
Letter / noticeCP21A
MeaningChanges you requested — you owe
Action needed?Yes — see steps
What happens next
Pay by the date on the notice to limit interest and penalties.
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What you should do
- Check the changes match what you requested
- Pay or set up a payment plan
Scam check: the IRS first contacts you by mail. Use only the phone numbers printed on your letter or on IRS.gov — never ones from a text, email or unofficial site.
Frequently asked questions
What does IRS Notice CP21A mean?
The IRS made the changes you asked for (often on an amended return) and, as a result, you owe a balance.
What should I do?
Check the changes match what you requested Pay or set up a payment plan
How long does it take?
Pay by the date on the notice to limit interest and penalties.
Sources
- IRS: Understanding your IRS notice or letter
- IRS: Get Transcript
- Taxpayer Advocate Service (independent help inside the IRS)
Written by the editorial team and checked against the official sources above. See our editorial policy.
By the TranscriptCodes Editorial Team · Last reviewed 2026-11-12.