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Official form guide
IRS Form 4810 is the “Request for Taxpayer Identification Number (TIN) and Certification.” It is used when a foreign person or entity needs a U.S. TIN for tax reporting purposes.
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IRS Form 4810 is the “Request for Taxpayer Identification Number (TIN) and Certification.” It is used when a foreign person or entity needs a U.S. TIN for tax reporting purposes.
Plain English
If you are not a U.S. citizen or resident but have U.S. tax obligations, you fill out this form to get a taxpayer ID. The form also includes a short certification that you are a foreign person.
Submission Date
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Glossary Terms
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Form selector
Foreign individual with no SSN
ITIN issuance for personal returns
✓ Verify you are not filing a corporate information return
U.S. business applying for EIN
Employer ID for domestic entities
✓ Use only for U.S. entities
Existing TIN needs correction
Update name or address on an existing SSN
✓ Confirm you are not requesting a new TIN
The form must be received before the first filing that requires the TIN, typically by the due date of the related information return (e.g., March 15 for partnership returns). If the TIN is not issued in time, you may need to request an extension for the underlying return.
Checklist
Applicant name
Government‑issued ID (passport) · Passport front page
Foreign address
Utility bill or bank statement · Document showing address
Reason for TIN
Business purpose description · Letter from client or contract
Signature
Hand‑signed signature block · Original signature on form
Field map
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->Form 4810 is actively in use for the 2024 tax year. The IRS updates the form annually; verify the edition date before filing.
Quick Facts
Downloads
Form 4810 vs. Form W‑7
Both request IDs but for different purposes
→ Verify your filing purpose before choosing
Signature requirement
Some think electronic signature is okay
→ Only hand‑signed ink is accepted
Mailing address
Multiple IRS addresses exist
→ Use the address listed for foreign applicants in the instructions
Supporting ID type
Passport vs. national ID
→ Follow the specific list in the instructions
Reason for TIN field
Vague answers cause delays
→ Provide a concise business purpose
Workflow map
Before
Current
After
Often used with
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