Understanding your CP21C Notice
We made the change(s) you requested to your tax return for the tax year specified on the notice. You're not due a refund nor do you owe any additional amount. Your account balance for this tax form and tax year is zero.
Printable samples of this notice (PDF)
Tax publications you may find useful
How to get help
Calling the toll free number listed on the top right corner of your notice is the fastest way to get your questions answered.
You can also authorize someone (such as an accountant) to contact the IRS on your behalf using this Power of Attorney and Declaration of Representative (Form 2848).
Or you may qualify for help from a Low Income Taxpayer Clinic.
What you need to do
- Read your notice carefully ― it shows the area(s) of your tax return that changed, e.g., Schedule A.
- If you agree with the notice, you don't need to do anything.
- If you disagree with the notice, please contact us at the toll-free number listed on the top right corner of the notice.
- Correct the copy of your tax return that you kept for your records.
Answers to Common Questions
The notice says "Based on the information you provided, we changed your 200X Form 1040 to correct your...". I don't remember sending any change to IRS. How can I find out what IRS received to initiate this change?
Please contact us at the number listed on your notice for specific information about your tax return.
What if I need to make another correction to my account?
You'll need to file Form 1040X, Amended U.S. Individual Income Tax Return.
What if I've tried to get answers and after contacting IRS several times have not been successful?
Call Taxpayer Advocate at 1-877-777-4778 or for TTY/TDD 1-800-829-4059.
What if I think I’m a victim of identity theft?
Please contact us at the number listed on the top right corner of your notice. Refer to the IRS Identity Theft resource page for more information.