Information For...

For you and your family
Standard mileage and other information

Forms and Instructions

Individual Tax Return
Instructions for Form 1040
Request for Taxpayer Identification Number (TIN) and Certification
Request for Transcript of Tax Return

 

Employee's Withholding Allowance Certificate
Employer's Quarterly Federal Tax Return
Employers engaged in a trade or business who pay compensation
Installment Agreement Request

Popular For Tax Pros

Amend/Fix Return
Apply for Power of Attorney
Apply for an ITIN
Rules Governing Practice before IRS

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.


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 20XX 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.

Printable samples of this notice (PDF)

How to get help