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In the IRS’s own words · not reviewed by VALID

CP561B notice explained, in the IRS’s own words

We have important information about your child’s Adoption Taxpayer Identification Number (ATIN). The extension for your child’s ATIN expires in 3 months.

Read the full CP561B page on irs.gov ↗

Quoted from www.irs.gov/individuals/understanding-your-cp561b-notice, read October 15, 2026 · fingerprint 753c7319e78f

What this notice is about

We have important information about your child’s Adoption Taxpayer Identification Number (ATIN). The extension for your child’s ATIN expires in 3 months.

What you need to do

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Complete Form 15101, Provide a Social Security Number (SSN) for Adoptive Child PDF, included with your notice if you received a Social Security number (SSN) for your child.

  • You can send us your information using the Document Upload Tool. To use the tool, visit IRS.gov/dutreply, or:
  • If you prefer, fax your information to the fax number in the notice using either a fax machine or an online fax service. Protect yourself when sending digital data by understanding the fax service’s privacy and security policies.

You may want to

  • Call us at the number listed in your notice.
  • See additional information on Adoption taxpayer identification number.

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

You can’t claim your child on your tax return. You can file an amended return once you have an SSN for your child.

What to do next

  • Write down the date on the letter today.
  • Look the number up on irs.gov yourself. Don’t trust a link or phone number from anyone else.
  • If it says you owe money or proposes changes to your return, take it to a licensed CPA, EA or tax attorney before that date.

Not advice. Not a filing. Verify with a licensed professional. Rules change by year and facts.

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