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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

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

Understanding Your CP127 Notice

What this notice is about

We made changes to your Form 1042, Annual Withholding Tax Return for U.S. Source Income of Foreign Persons, because we found a miscalculation. Our changes don’t affect the amount of tax you owed.

What you need to do

  • Read the notice carefully.
  • Compare the figures on the notice with your tax return.
  • Contact us within 10 days of the date of the notice if you disagree with the changes we made. Please have your account information available when you call.
  • Correct the copy of your tax return that you kept for your records if you agree with our changes. Keep this notice for your records.

You may want to

Download a copy of Instructions (PDF) for Form 1042 (PDF). You can download additional forms or publications, or you can call 1-800-TAX-FORM to request them by mail.

Answers to common questions

What should I do if I have been charged a penalty and I don’t agree?

If we charged a penalty and you would like us to consider removing it, you must send us a written request. When you write, identify the penalty you would like us to reconsider and explain the reasons why we should remove it.

Tips for next year

  • Consider filing your taxes electronically. Filing online can help you avoid mistakes. Learn more about filing options.
  • Review your return for accuracy before mailing it to us.


Printable samples of this notice (PDF)

How to get help