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For you and your family
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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
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Rules Governing Practice before IRS

Understanding Your CP561A Notice

What this notice is about

Important Information about your child's Adoption Taxpayer Identification Number (ATIN) - Your child's ATIN expires in 3 months. 

What you need to do

  • Complete Form 15100, Adoption Taxpayer Identification Number (ATIN) (PDF) Extension Request, included with your notice if you received a Social Security number (SSN) for your child, or;

  • Apply for a one-year extension of this ATIN by completing Form 15100, if you don't have an SSN.

  • Detach notice stub, mail it with Form 15100 in the envelope provided. If you prefer, you can fax it using the information provided on the form.

You may want to

Answers to common questions

What can I do if I don't have a Social Security number (SSN) for my adoptive child?

You can request an extension before your assigned ATIN expires by completing Form 15100 included with your notice. The extension is only valid for 1 additional year.

Printable samples of this notice (PDF)

How to get help