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Official form guide
IRS Form 4669 is an application to request an automatic extension of time to file a tax return. Use it when you cannot meet the regular filing deadline and need extra time to complete the return.
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IRS Form 4669 is an application to request an automatic extension of time to file a tax return. Use it when you cannot meet the regular filing deadline and need extra time to complete the return.
Plain English
If you need more time to file a return, you fill out Form 4669 to ask the IRS for a short extension. The form tells the IRS why you need the extra days and how long you’re asking for.
Submission Date
AI co-pilot
Form selector
Need more than 6 months extension
Different statutory limits
✓ Verify which form matches your return type
Requesting payment plan
Extension not applicable
✓ Use payment agreement form instead
The extension request must be filed on or before the original filing deadline for the return in question. If filed after that date, the IRS will not grant the automatic extension and penalties may apply. No separate deadline beyond the original filing date is provided.
Checklist
Taxpayer name and SSN
Social Security card or ITIN letter · Form 4669, top section
Tax year
Prior year return · Prior year filing documents
Reason for extension
Written explanation · Personal records or supporting letters
Signature
Signed form · Authorized signer’s signature
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->Check the IRS website for the latest edition date and any recent updates to filing addresses. The form is active for all tax years unless superseded by a new version.
Quick Facts
Downloads
Extension vs. payment deadline
Taxpayers think extra time to file also delays payment
→ Verify payment due date separately
Form 4669 vs. Form 4868
Both request extensions but apply to different return types
→ Check which return you are filing
Electronic filing availability
Some users assume e‑file works for all extensions
→ Confirm e‑file option in current instructions
Number of days requested
Over‑requesting beyond statutory limit
→ Request only the automatic period allowed
Signature authority
Unsure who can sign for a business
→ Use an authorized officer or power of attorney
Workflow map
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Current
After
Often used with
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