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IRSOther IRS Forms (7000–9999)

Official form guide

Form 8404: 8404

IRS Form 8404 is an application used to request an automatic extension of time to file a specific tax return. File it when you cannot meet the normal filing deadline for the associated return.

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Form Overview

IRS Form 8404 - 8404

IRS Form 8404 is an application used to request an automatic extension of time to file a specific tax return. File it when you cannot meet the normal filing deadline for the associated return.

It captures the taxpayer’s identifying information, the return type, the requested extension period, and a brief reason for the request.

Risk Radar

Scan points
  • 1A single typo in the taxpayer ID can void the entire extension request.
  • 2Incorrect EIN/SSN
  • 3Wrong return type selected
  • 4Extension period exceeds allowed maximum
  • 5Missing signature

Plain English

Think of Form 8404 as a permission slip to get extra weeks to turn in a tax return. You fill it out, send it to the IRS, and they grant you more time if the request is valid.

Submission Date

  • Filing date: 2026-01-12 17:10:44
  • Preparation window: collect IDs, supporting records, and signatures in advance.
  • Final review: verify names, dates, and required fields before submission.

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Glossary Terms

periodgrant

Hover a term to preview the meaning.

What this form is for

  • Use when you need an automatic extension for the specific return listed in the instructions.
  • Do not use for extensions of estimated tax payments.
  • If you need a longer than standard extension, see Form 4868 or other applicable forms.

Form selector

Use this form or another form?

Need more than 6 months extension

Different statutory limits apply

✓ Verify eligibility before filing

Form 4868 (individual) or Form 7004 (business)

Requesting an extension for a partnership return

Covers Form 1065 extensions

✓ Ensure partnership EIN matches

Form 7004

Deadline or filing window

The extension request must be received by the IRS on or before the original due date of the return you are extending. If the request arrives after that date, the extension is not granted and penalties may apply. The exact deadline varies by return type; refer to the instructions for the specific return.

Checklist

What you need before filling it out

1

Taxpayer ID

Social Security Number or EIN · Tax return header

⚠ Mis‑typed digits cause denial✕ High
2

Return type

Copy of the original return form · IRS instructions

⚠ Selecting wrong form leads to rejection✕ Medium
3

Requested extension end date

Calendar calculation · Extension period limits table

⚠ Exceeding allowed days invalidates request✕ High

Before you submit

  1. 1Confirm the form version matches the current tax year
  2. 2Verify taxpayer ID matches the return being extended
  3. 3Select the correct return type
  4. 4Enter a valid extension end date within allowed limits
  5. 5Attach any required supporting documentation
  6. 6Sign and date the form
  7. 7Use the correct IRS mailing address
  8. 8Include a prepaid return envelope if mailing
  9. 9Retain a copy of the completed form for your records
  10. 10Track mailing delivery or fax confirmation

How to file this form

  1. 1Gather the original return’s due date and taxpayer identification
  2. 2Download the latest Form 8404 from IRS.gov
  3. 3Fill out identification and return‑type sections
  4. 4Calculate the requested extension end date
  5. 5Attach any required supporting documents
  6. 6Sign the form
  7. 7Mail or fax to the address listed in the instructions

Known limitations

  1. 1Form only grants the standard automatic extension period; longer extensions require other forms
  2. 2No electronic filing (e‑file) option for most return types
  3. 3The form does not waive any tax liability; payments are still due by the original deadline
  4. 4IRS may reject the request if any field is incomplete or inconsistent

Field map

Compact field-by-field guide

6 fields

General Info

2 items

Taxpayer Name and TIN

Full legal name and taxpayer identification number (SSN or EIN).

Requiredtext
Address

Current mailing address.

Requiredtext

Details

2 items

Required Information

Complete all applicable sections of this form according to the official IRS instructions.

Requiredtext
Amount (if applicable)

Enter the relevant dollar amount if this form involves tax calculation.

amount

Certification

1 items

Certification Statement

Read and acknowledge any certifications required by this form.

Requiredcheckbox

Signatures

1 items

Signature

Sign and date. Unsigned forms cannot be processed.

Requiredsignature
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Current form status
IRS

Form 8404 is active for the 2024 tax year. The IRS has not announced any pending revisions, but check the official site for updates before filing.

What changed or needs a fresh check

  • Edition date – verify the form is the latest version (current as of 2024)
  • Fee – no filing fee for Form 8404
  • Mailing address – use the address in the instructions for the specific return type
  • Signature line – must be signed by an authorized person
  • Electronic submission option – check if fax or e‑file is permitted

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Form 8404 page 2

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Quick Facts

The taxpayer, estate, trust, or tax‑exempt organization that needs more time to file the return files this form.
It captures the taxpayer’s identifying information, the return type, the requested extension period, and a brief reason for the request.
Submit the form before the original filing deadline of the return you are extending; typically the same day the return is due.
Mail the completed form to the IRS address listed in the instructions for the specific return type, or fax if an electronic option is provided.
Errors or missing information can cause the extension to be denied, leaving you liable for late‑filing penalties.
Gather the tax‑payer’s EIN or SSN, the exact return you are extending, and the reason for delay. Complete the identification section, enter the requested extension end date, and sign. Double‑check the address and any required supporting documents before mailing or faxing.

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After you file

  1. 1Keep the mailed/faxed copy and any delivery receipt
  2. 2Mark the new extended due date on your calendar
  3. 3Prepare the underlying return ahead of the new deadline
  4. 4Monitor IRS correspondence for acceptance or rejection notices
  5. 5If rejected, file the appropriate alternative extension form immediately
  6. 6Retain all supporting documents for at least three years

Sources

  • SRCForm 8404 title and purposeIRS official form description
  • SRCEligibility and extension limitsinstructions for Form 8404
  • SRCSignature requirementinstructions section on{signature line} not found in provided source

Common confusion points

Extension period length

Different returns have different maximum periods

→ Check the specific return’s instructions

Who can sign

Some entities require an officer’s signature

→ Verify signing authority before completing

Mailing address

Addresses differ by return type and state

→ Use the address from the current instructions

Electronic vs. fax submission

Not all returns accept fax

→ Confirm submission method in the form guide

Fee expectation

Some users think a fee is required

→ Form 8404 has no filing fee

Workflow map

Related forms and next steps

5 signals

Before

Form 1040, 1120, 1065 – the return you are extending

Current

8404

After

Pay any tax due by the original deadline to avoid interest

Often used with

Form 4868 – individual extension when longer period neededForm 7004 – business and partnership extensions

⚠ If something goes wrong

  • Form 941‑X – to correct a rejected extension

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Source transparency

Copyright & Licensing - US Government Forms

Independent guide

BrieflyGo links to and explains official public form sources. We are not a government agency, and this page is for general form guidance, not legal advice.

Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Verify current license terms with the source agency before reuse outside this platform.

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