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 CP180 CP181 Notice

We sent you this notice because your tax return is missing a schedule or form.

What you need to do

  • Read the notice carefully to determine the required schedule or form needed to complete your return.
  • Download the required schedule or form or call 1-800-829-3676.
  • Fill out the Contact Information section of the notice, detach, and send it to us with your completed schedule or form so we receive it by the date indicated on the notice.

You may want to

  • Review the filing requirements and instructions for the missing schedule or form to determine whether your organization needs to file.
  • Review your records to ensure all applicable schedules and forms were attached when filed.

Answers to Common Questions

What happens if I don't respond by the due date?
If you don't respond by the due date of the notice, your tax and/or credits may be adjusted which may result in a balance due.

Who do I call for assistance?
For assistance with your business return, call 1-800-829-0115 or, for assistance with Form 990-T, call 1-877-829-5500.

Tips for next year

Refer to the instructions for your tax return for required documentation. Attach all required forms and schedules to your tax return when filing.

Consider filing your taxes electronically. Filing online can help you avoid mistakes and find credits and deductions that you may qualify for. In many cases you can file for free. Learn more about e-file.