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 CP231 Notice

Your refund or credit payment was returned to us and we need you to update your current address.

What you need to do

You can either call us or complete and send in the new contact information section at the bottom of the notice we sent you.

If you call us at the toll-free number listed on the notice, please be ready to provide the following information:

  • Employer ID number for the Tax Form you filed
  • Title of the person authorized to sign for the company, corporation, business, etc.)
  • Current address
  • Telephone number
  • Best time for us to call

If you complete and send in the new contact information section please:

  • Have the authorized individual sign the information section and print his/her name and the official title.
  • Print the current address, city, state, Country, and Zip code.
  • Fill in a primary and secondary phone number and the best time for us to call.
  • Use the envelope provided.

We will request that your check or credit payment be reissued. Be sure that our address shows through the envelope window.

Answers to common questions

Once I send in my information, how soon will I get my refund or credit payment?

You should receive this within 3 - 4 weeks.

Printable samples of this notice (PDF)

How to get help