IRS Form 15101 – Provide SSN for Adoptive Child (Fillable PDF)

IRS Form 15101, Provide a Social Security Number (SSN) for Adoptive Child, is used by parents who have received an Adoption Taxpayer Identification Number (ATIN) and later obtain the child’s SSN. The form notifies the Internal Revenue Service (IRS) of the new SSN so the ATIN can be retired.

What Is IRS Form 15101?

This one‑page form collects basic contact information for up to two taxpayers, the child’s SSN, the child’s name, and the original ATIN. It is required only after the adoption is final and the child’s SSN is issued.

How to Complete the Form

Follow these steps to fill the form quickly:

• Enter the name(s) and Social Security Number(s) of the adopting parent(s) at the top.
• Provide your mailing address, phone numbers, and preferred contact times.
• Enter the child’s SSN exactly as it appears on the Social Security card.
• Write the child’s full legal name.
• Enter the ATIN that was previously assigned.
• Both parents must sign and date the form.

Common Mistakes to Avoid

• Leaving the ATIN field blank – the IRS needs this to match the previous filing.
• Using an outdated address – update your address on Form 8822 if it has changed.
• Signing only one side when filing jointly – both spouses must sign.
• Submitting the form before the child’s SSN is officially issued.

Where to Submit the Form

You can mail the completed form to the IRS address printed on the second page, or fax it to (855) 250‑1731. If you received a CP‑561C notice, attach the notice stub before mailing.

Download the Fillable PDF

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