Mailing and fax details
The top of the form prints a standard mailing address, an overnight address, a fax number and a phone number for questions.
15101
Provide a Social Security Number (SSN) for Adoptive Child
- Agency
- IRS
- Revision
- Rev. 10-2017
- Fillable fields
- 25
- Pages
- 2
- Official source
- IRS form page
- Checked
- October 21, 2026
Form 15101: Provide a Social Security Number (SSN) for Adoptive Child
Form 15101, Provide a Social Security Number (SSN) for Adoptive Child, is a one-page IRS form with its instructions on page 2. The instructions say to use it ONLY to inform the IRS of the Social Security number (SSN) for an adoptive child if the IRS provided an adoption taxpayer identification number (ATIN) for that child.
The instructions say that after the adoption is final, the ATIN is not used any longer, and Form 15101 is the way to give the IRS the SSN the child received. Form 15101 is not an application for an SSN: the instructions point out that only the Social Security Administration (SSA) can assign one, through Form SS-5.
The form asks for the parents' names and taxpayer identification numbers, a new address if it changed, phone numbers, the child's SSN, name and ATIN, and the original signatures of the adoptive parents. It is faxed or mailed to the IRS in Austin, Texas. You can fill out Form 15101 free in your browser on this page and download it without an account.
What's on Form 15101
Contact information
Two rows, each with a name and a taxpayer identification number.
New address
Address, city, state and ZIP code fields under the line "If you changed your address, write your new address below."
Phone numbers
A primary and a secondary telephone number, each with a best time to call and a.m. and p.m. boxes.
Child's SSN, name and ATIN
Three lines: "I received social security number", "Name of adoptee" and "I was assigned the following ATIN."
Signatures
Two lines for the original signatures of the adoptive parents, each with a printed name, signature and date.
How to fill out Form 15101
- 1
Contact information
Enter each adoptive parent's name and taxpayer identification number in the two rows.
- 2
Address
Fill in the address row only if your address changed, as the form says.
- 3
Phone numbers
Enter a primary and, if you have one, a secondary phone number, with the best time to call and a.m. or p.m. checked.
- 4
SSN, name and ATIN
Enter the SSN the child received from the SSA, the name of the adoptee and the ATIN the IRS assigned.
- 5
Sign and date
Each adoptive parent prints a name, signs and dates. The form asks for original signatures.
- 6
Fax or mail
Send the completed form to the IRS by fax or by mail, using the details printed at the top of the form.
Why fill Form 15101 on indox
You get the real form, filled in a browser tab, with nothing standing between you and the finished PDF.
- Fill the form right in your browser, no software to install
- Free to fill and free to download, with no account
- The official blank straight from the IRS, not a copy someone retyped
- Works on a phone, tablet or computer
Where to send it and what to know
Mailing address
Standard mail: Internal Revenue Service, Stop 6182, Austin, TX 73301-0066. Overnight: Internal Revenue Service, 3651 S. Interregional Hwy 35, Stop 6182, Austin, TX 78741.
Fax
The form prints the fax number (855) 250-1731.
Questions
The form says to contact the IRS at (737) 800-5511 (not toll free) with questions.
Getting the SSN first
The instructions say Form SS-5 is filed with the SSA, which can be reached at 1-800-772-1213, and that it usually takes about 2 weeks to get an SSN once the SSA has all the evidence and information it needs.
SSN denied
If the SSA denies the application, the instructions say to contact the IRS to request an extension or reactivation of the ATIN and include the SSA's denial letter or an explanation.
Latest information
The instructions point to www.irs.gov/w7a for developments related to Form 15101.
Related forms
Who fills out Form 15101?
The adoptive parents complete and sign the form and send it to the IRS. The form's signature section is titled "Original signatures of adoptive parents."
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Questions about Form 15101
Does Form 15101 get my adopted child an SSN?
No. The instructions say only the Social Security Administration can assign an SSN. The application for one is Form SS-5, filed with the SSA.
When is Form 15101 used?
The instructions say to use it only to inform the IRS of the SSN for an adoptive child if the IRS provided an ATIN for that child.
Can I keep using the ATIN after the adoption is final?
The instructions say not to continue using the ATIN after the adoption is final, and to use Form 15101 to provide the SSN the child received.
What if the SSA denies the SSN application?
The instructions say to contact the IRS to request an extension or reactivation of the ATIN, including the SSA's denial letter or an explanation.
Who signs Form 15101?
The form has two lines for the original signatures of the adoptive parents, each with a printed name and date.
How do I send Form 15101?
The form says to fax or mail it. It prints a fax number, a standard mailing address and an overnight address, all for the IRS in Austin, Texas.