Understanding your CP561B notice

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

• 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.

Frequently asked questions

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.