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Official form guide
Form 15101-SP: 15101 (sp)
Internal Revenue Service Form 15101 is used to report the Social Security Number of an adopted child when the IRS has previously issued an Adoption Taxpayer Identification Number (ATIN). Adoptive parents file it to replace the ATIN with the child’s SSN.
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IRS Form 15101-SP - 15101 (sp)
Internal Revenue Service Form 15101 is used to report the Social Security Number of an adopted child when the IRS has previously issued an Adoption Taxpayer Identification Number (ATIN). Adoptive parents file it to replace the ATIN with the child’s SSN.
Risk Radar
Scan points- 1Submitting the form without the adopted child’s SSN is the most critical error.
- 2Leaving the adopted child’s Social Security Number blank.
- 3Failing to include the IRS‑assigned ATIN for the child.
- 4Omitting the adoptive parents’ taxpayer identification numbers.
- 5Not providing both parents’ signatures and dates.
Plain English
Form 15101 lets adoptive parents tell the IRS the Social Security Number their adopted child received after the adoption is final. It replaces the temporary ATIN the IRS gave. The form is mailed or faxed to the IRS office in Austin.
Submission Date
- Filing date: 2022-06-09 22:10:24
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
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What this form is for
- Use this form when you need to report the Social Security Number of an adopted child after the IRS has issued an ATIN.
- Do not use it when you need to obtain a Social Security Number for the adopted child; only the SSA can assign an SSN.
- Check Form SS-5 (sp) instead when you need to request a Social Security Number for the adopted child.
Form selector
Use this form or another form?
Need to obtain a Social Security Number for the adopted child
SSA assigns SSNs, not the IRS
✓ Verify the child’s adoption is finalized and you have required documents
Attempting to request a Social Security Number through the IRS
IRS does not issue SSNs; using this form will be rejected
✓ Confirm you are not using the IRS form for SSN issuance
Need to replace ATIN with received SSN after adoption finalizes
Provides IRS with the child’s SSN to discontinue ATIN use
✓ Ensure you have the child’s SSN and original ATIN
Deadline or filing window
Not stated in the official source.
Checklist
What you need before filling it out
Child's Social Security Number
Adopted child's SSN from SSA · Form 15101 field 'Recibí el número de Seguro Social'
Adoption Taxpayer Identification Number (ATIN)
ATIN assigned by IRS · Form 15101 field 'Me asignaron el siguiente número de identificación del contribuyente en proceso de adopción (ATIN)'
Parent's taxpayer identification number
Parent's SSN or ITIN · Form 15101 section 'Nombre Número de identificación del contribuyente'
Signature of adoptive parent
Original signature · Form 15101 signature line
Date of signing
Date of execution · Form 15101 date field
Contact phone number
Primary phone number · Form 15101 'Número de teléfono primario'
Before you submit
- 1Verify the child's SSN is entered in the 'Recibí el número de Seguro Social' field.
- 2Confirm the ATIN is entered in the 'Me asignaron el siguiente número de identificación del contribuyente en proceso de adopción (ATIN)' field.
- 3Ensure both adoptive parents have printed or typed their names in the signature lines.
- 4Sign each required signature line with an original signature.
- 5Date each signature line with the current date.
- 6Include a secondary phone number if applicable in the 'Número de teléfono secundario' field.
- 7Attach the SSA denial letter if requesting ATIN reactivation.
- 8Use the standard mailing address: IRS Stop 6182 Austin, TX 73301-0066.
- 9If using next‑day delivery, address to 3651 S. Interregional Hwy 35 Stop 6182 Austin, TX 78741.
- 10Fax the completed form to (855) 250-1731 if preferred.
- 11Keep a copy of the completed form for your records.
- 12Confirm the contact phone number is (737) 800-5511.
How to file this form
- 1Collect the adopted child’s SSN and the IRS‑issued ATIN, plus each parent’s taxpayer identification number — have all numbers ready.
- 2Enter the child’s SSN in the 'Recibí el número de Seguro Social' field and the ATIN in its designated field — verify entries on the form.
- 3Print each adoptive parent’s name, sign the signature lines, and date them — original signatures present.
- 4Add your primary and secondary phone numbers in the appropriate sections — contact info completed.
- 5Place the completed form in an envelope addressed to Internal Revenue Service Stop 6182 Austin, TX 73301-0066 — ready for mailing.
- 6Mail the envelope via standard postal service or send by fax to (855) 250-1731 — obtain mailing receipt or fax confirmation.
- 7File a copy of the submitted form for your records — retain proof of filing.
Known limitations
- 1Form 15101 (sp) does not apply if the IRS has not issued an Adoption Taxpayer Identification Number (ATIN) for the child.
- 2Form 15101 (sp) cannot be used to request a Social Security Number; only the Social Security Administration can assign an SSN.
- 3Form 15101 (sp) must not be filed in place of Form 15100 (sp) for obtaining an SSN.
- 4After the adoption is finalized, the ATIN must not continue to be used; the child’s SSN must be reported using Form 15101 (sp).
Field map
Compact field-by-field guide
General Info
2 items
Full legal name and taxpayer identification number (SSN or EIN).
Current mailing address.
Details
2 items
Complete all applicable sections of this form according to the official IRS instructions.
Enter the relevant dollar amount if this form involves tax calculation.
Certification
1 items
Read and acknowledge any certifications required by this form.
Signatures
1 items
Sign and date. Unsigned forms cannot be processed.
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Fillable formOpen in Editor->The form is Rev. 10-2017. The source directs users to www.irs.gov/w7a for the most recent information.
What changed or needs a fresh check
- Edition date — confirm the revision reads 10-2017
- Mailing address — confirm standard delivery address is Internal Revenue Service Stop 6182 Austin, TX 73301-0066
- Fax number — confirm fax is (855) 250-1731
- Phone number — confirm contact number is (737) 800-5511
- Future updates — confirm you can view latest information at www.irs.gov/w7a
- Signature — confirm original signatures are required on the form
Quick Facts
Downloads
After you file
- 1Retain a signed copy of Form 15101 (sp) for at least three years.
- 2Keep any IRS acknowledgment or receipt notice with your tax records.
- 3If an error is discovered, file an amended Form 15101 (sp) with corrected information.
- 4Monitor for a confirmation notice from the IRS; if none is received within 30 days, call the IRS at (737) 800-5511.
- 5Store the SSA SSN assignment documentation together with the Form 15101 (sp) copy.
Sources
- SRCForm p.2 — purpose: report SSN for adopted child when IRS provided ATIN.
- SRCForm p.2 — caution: do not file Form 15100 (sp) for SSN request.
- SRCForm p.2 — only the SSA can assign an SSN.
- SRCForm p.2 — after adoption is definitive, stop using ATIN and use Form 15101 (sp) to provide the SSN.
- SRCForm p.1 — standard delivery address: Internal Revenue Service Stop 6182 Austin, TX 73301-0066.
- SRCForm p.1 — next‑day delivery address: Internal Revenue Service 3651 S. Interregional Hwy 35 Stop 6182 Austin, TX 78741.
- SRCForm p.1 — fax number: (855) 250-1731.
- SRCForm p.1 — phone number: (737) 800-5511.
- SRCForm p.2 — obtain Form SS-5 (sp) from www.ssa.gov/espanol/ or call 1-800-772-1213.
- SRCForm p.2 — if SSA denies SSN request, contact IRS for ATIN extension or reactivation.
Common confusion points
Do I use Form 15101 (sp) to get a Social Security Number for my adopted child?
The form is only for reporting an SSN after the SSA issues it; SSNs are assigned by the SSA, not the IRS.
→ Verify that you have received the SSN from the SSA before completing the form.
Can I submit Form 15100 (sp) instead of Form 15101 (sp)?
Form 15100 (sp) is not for SSN requests and the instructions explicitly prohibit its use.
→ Check the instructions that state not to file Form 15100 (sp) for SSN.
Do I still need to use the ATIN after the adoption is finalized?
The instructions say to stop using the ATIN once the adoption is final.
→ Confirm you are using Form 15101 (sp) to report the SSN, not the ATIN.
Where do I mail the completed Form 15101 (sp)?
There are two addresses: a standard‑delivery address and a next‑day‑delivery address.
→ Match your mailing choice to the address listed on the form.
What if the SSA denies my SSN request?
The instructions say to contact the IRS for an ATIN extension or reactivation.
→ Include the SSA denial letter with your IRS correspondence.
Do I need to include my secondary phone number on Form 15101 (sp)?
The form provides a field for a secondary phone number, but it is optional.
→ Leave the field blank if you have no secondary number.
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Contact IRS at (737) 800-5511 to request an ATIN extension or reactivation.
- Include the SSA denial letter with the IRS correspondence.
Questions about IRS Form 15101-SP
What is IRS Form 15101-SP used for?
Form 15101 lets adoptive parents tell the IRS the Social Security Number their adopted child received after the adoption is final. It replaces the temporary ATIN the IRS gave. The form is mailed or faxed to the IRS office in Austin.
Who must file IRS Form 15101-SP?
Adoptive parents who have been assigned an ATIN for their newly adopted child must file Internal Revenue Service Form 15101.
What information does IRS Form 15101-SP require?
The form collects the child’s name, the SSN received, the ATIN previously assigned, and the parents’ taxpayer identification numbers, addresses, phone numbers, and signatures.
Where do I file IRS Form 15101-SP?
Send Form 15101 to the Department of the Treasury Internal Revenue Service, Austin, TX 73301-0066.
How do I complete IRS Form 15101-SP?
First, complete the parent’s taxpayer ID, name, and address fields. Next, enter the adopted child’s name, the ATIN the IRS assigned, and the child’s SSN. Then both adoptive parents sign and date the form. Finally, mail or fax the completed form to the IRS address listed on the form.
What happens if IRS Form 15101-SP is filed incorrectly?
If the SSN is not reported correctly, the IRS may require the parents to request an ATIN extension or reactivation, causing additional correspondence.
Do I use Form 15101 (sp) to get a Social Security Number for my adopted child?
The form is only for reporting an SSN after the SSA issues it; SSNs are assigned by the SSA, not the IRS. Verify that you have received the SSN from the SSA before completing the form.
Can I submit Form 15100 (sp) instead of Form 15101 (sp)?
Form 15100 (sp) is not for SSN requests and the instructions explicitly prohibit its use. Check the instructions that state not to file Form 15100 (sp) for SSN.
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