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 CP126 Notice

We believe you have miscalculations on your return, and we changed it.


What you need to do

  • Compare the figures on your tax return with the figures on the notice.
  • Make the changes to your copy of your tax return for your records.
  • Contact us in writing within 60 days if you don’t agree with the changes.

You may want to

Call us at the phone number on the notice if you changed your address.


Answers to Common Questions

My overpayment is less than $1. Will you send it to me?

If the overpayment is less than $1, you must request the refund in writing.

What if I don’t agree with the changes?

Contact us within 60 days in writing. We’ll review your information and reverse the changes we made to your account if you can show we made a mistake.

What if I don’t have documentation to justify the reversal of changes?

We will forward the case for audit. The auditor will contact you within 5 to 6 weeks to fully explain the process.

Printable samples of this notice (PDF)

How to get help