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Official form guide
Form 15100-SP: 15100 (sp)
IRS Form 15100 (sp) is a request for a one‑year extension of an Adoption Taxpayer Identification Number (ATIN) filed by adoptive parents of a child in the adoption process.
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IRS Form 15100-SP - 15100 (sp)
IRS Form 15100 (sp) is a request for a one‑year extension of an Adoption Taxpayer Identification Number (ATIN) filed by adoptive parents of a child in the adoption process.
Risk Radar
Scan points- 1Submitting the form without the adoptive parents’ original signatures.
- 2Leaving the adoptive parents’ signature lines blank, which invalidates the request.
- 3Omitting the child’s name or the ATIN when requesting a one‑year extension.
- 4Failing to indicate the correct circumstance (e.g., need a one‑year extension) on the form.
- 5Not attaching the required signed documents from the placement agency.
Plain English
This form lets adoptive parents ask the IRS for extra time to get an ATIN for a child they are adopting. They provide their contact info, the child’s name, and explain why they need the extension, such as not yet having a Social Security number. The form must be signed and mailed or faxed to the IRS address listed.
Submission Date
- Filing date: 2022-06-09 22:10:27
- 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 adoptive parents need a one‑year extension of an Adoption Taxpayer Identification Number (ATIN) for a child in the adoption process.
Form selector
Use this form or another form?
Received Social Security Number for adopted child
Provides the SSN to IRS for the child
✓ Verify the SSN matches the child's adoption records
Need one‑year ATIN extension for adopted child
Requests a 12‑month extension of the ATIN
✓ Confirm the ATIN assigned is correct and reason is entered
Unable to obtain Social Security Number for adopted child
Allows filing for ATIN when SSN unavailable
✓ Ensure the reason for missing SSN is clearly explained
Deadline or filing window
Not stated in the official source.
Checklist
What you need before filling it out
ATIN request section
Reason for extension or inability to obtain SSN · Form 15100 (sp)
Adoption status selection
Indicate whether adoption is definitive or pending · Form 15100 (sp)
Primary phone number
Primary phone number and best call time · Form 15100 (sp)
Signature block
Printed name, signature, and date of each adoptive parent · Form 15100 (sp)
Mailing address fields
New address if changed · Form 15100 (sp)
Before you submit
- 1Verify the form revision reads Rev. 10‑2017.
- 2Enter the adoptive parents’ names and taxpayer identification numbers.
- 3Complete the address, city, state, and ZIP fields.
- 4Provide primary and secondary phone numbers with best call times.
- 5Select the appropriate ATIN request option and fill the assigned ATIN or SSN.
- 6Indicate the adoption status (definitive or pending).
- 7Attach signed documents from the placement agency.
- 8Have each adoptive parent print their name, sign, and date the signature block.
- 9Choose the standard delivery mailing address or next‑day address as needed.
- 10Mail the completed form to the IRS address or fax it to (855) 250‑1731.
How to file this form
- 1Complete all required fields on Form 15100 (sp) with accurate information.
- 2Attach the placement‑agency signed documents.
- 3Sign and date the form for each adoptive parent.
- 4Mail the form to the standard IRS delivery address or send via fax to (855) 250‑1731.
- 5Retain a copy of the signed form and any attachments as proof of filing.
Known limitations
- 1The form’s fee is not stated in the official source; verify any required payment on the IRS website before filing.
- 2Edition date shows Rev. 10‑2017; because tax forms often update, confirm the revision is current on the IRS site prior to submission.
- 3Both adoptive parents must sign and date the form; ensure each signature appears on the designated line to avoid processing delays.
- 4Standard delivery address is IRS Stop 6182, Austin TX 73301‑0066; verify this address matches the latest IRS instructions before mailing.
- 5If using next‑day delivery or fax, confirm the alternate address or fax number matches current IRS guidance; details may have changed.
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 the revision dated 10‑2017; the source does not indicate any later edition or changes.
What changed or needs a fresh check
- Edition date — confirm the form reads Rev. 10‑2017
- Fee — Not stated in the official source
- Mailing address — confirm use of the standard delivery address: Internal Revenue Service Stop 6182 Austin, TX 73301‑0066
- Signature — confirm both adoptive parents sign and date the form
Quick Facts
Downloads
Sources
- SRCForm p.1 — Catalog Number 93086C
- SRCForm p.1 — Form number 15100 (sp) Rev. 10-2017
- SRCForm p.1 — Title: Solicitud de prórroga del Número de identificación del contribuyente en proceso de adopción (ATIN)
- 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 for questions: (737) 800-5511 (no es un número gratuito)
Common confusion points
Do I send the form by regular mail or overnight?
Form offers both mailing and fax options
→ Use the address that matches your chosen service
Can I include a phone number for the child?
Form asks only for parents’ primary and secondary phone numbers
→ Leave child’s number blank
What if the adoption is already finalized?
Form provides a checkbox for “La adopción es definitiva”
→ Select that box if adoption is final
Do I need to attach the placement agency’s signed documents?
Form states “Adjunto documentos firmados por el agente o la agencia de colocación de niños”
→ Include those documents with the form
Should I write the child’s Social Security Number if I have one?
Form includes a checkbox for having received a Social Security Number for the adopted child
→ Check that box and enter the SSN if applicable
Is there a specific time to call the IRS for help?
Form asks for “Mejor hora para llamar” with a.m./p.m. fields
→ Provide the preferred call time in those fields
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Form 15100 (sp) – contact IRS at (737) 800-5511
Questions about IRS Form 15100-SP
What is IRS Form 15100-SP used for?
This form lets adoptive parents ask the IRS for extra time to get an ATIN for a child they are adopting. They provide their contact info, the child’s name, and explain why they need the extension, such as not yet having a Social Security number. The form must be signed and mailed or faxed to the IRS address listed.
Who must file IRS Form 15100-SP?
Adoptive parents of a child in the adoption process must file IRS Form 15100 (sp).
What information does IRS Form 15100-SP require?
The form collects the parents’ name, taxpayer ID, address, phone numbers, the child’s name, the ATIN (if assigned), the reason for the request, adoption status, and requires attached documents signed by the placement agency.
Where do I file IRS Form 15100-SP?
Standard delivery is to Internal Revenue Service Stop 6182, Austin, TX 73301-0066; next‑day delivery is to Internal Revenue Service 3651 S. Interregional Hwy 35 Stop 6182, Austin, TX 78741, or by fax to (855) 250-1731.
How do I complete IRS Form 15100-SP?
First, the adoptive parents enter their name, taxpayer identification number, address, and phone numbers. Next, they select the circumstance that applies—receiving a Social Security number, requesting a one‑year ATIN extension, or being unable to obtain a Social Security number—and provide the child’s name and ATIN if assigned. They then indicate whether the adoption is final or pending, attach the placement agency’s signed documents, and finally sign and date the form before mailing or faxing it to the IRS address.
Do I send the form by regular mail or overnight?
Form offers both mailing and fax options Use the address that matches your chosen service
Can I include a phone number for the child?
Form asks only for parents’ primary and secondary phone numbers Leave child’s number blank
What if the adoption is already finalized?
Form provides a checkbox for “La adopción es definitiva” Select that box if adoption is final
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