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IRSOther IRS Forms (1000–1999)

Official form guide

Form 14446-SO: 14446 (so)

Form 14446‑SO is the IRS’s Application for Extension of Time to File Certain Returns for sole proprietors and single‑member entities. File it when you need an automatic six‑month filing extension for the tax year in question.

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Form Overview

IRS Form 14446-SO - 14446 (so)

Form 14446‑SO is the IRS’s Application for Extension of Time to File Certain Returns for sole proprietors and single‑member entities. File it when you need an automatic six‑month filing extension for the tax year in question.

The form captures the taxpayer’s name, SSN/EIN, tax year, reason for the extension request, and the date you want the extension to end.

Risk Radar

Scan points
  • 1A missing signature will automatically invalidate the extension request.
  • 2Missing signature or date
  • 3Incorrect SSN/EIN
  • 4Wrong extension end date (must be six months)
  • 5Sending to the wrong IRS address

Plain English

If you run a business as a sole proprietor and can’t get your tax return ready by the April deadline, you can ask the IRS for extra time using this form. It’s a short request that, if accepted, moves the due date out to October.

Submission Date

  • Filing date: 2023-12-27 22:10:15
  • 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

membermonth

Hover a term to preview the meaning.

What this form is for

  • Use when you need a six‑month extension for a sole‑proprietor return.
  • Do not use for corporations or partnerships; they have separate extension forms.
  • If you already filed an extension with Form 4868, do not file 14446‑SO.

Form selector

Use this form or another form?

Corporation filing

Handles extensions for corporate returns

✓ Verify entity type first

Form 7004

Partnership filing

Different deadline rules

✓ Confirm partnership status

Form 7004 or Form 1065‑extension

Individual without Schedule C

General individual extension

✓ Ensure no business return attached

Form 4868

Deadline or filing window

The request must be received by the original filing deadline (typically April 15). If the IRS receives it after that date, the extension is not automatic and may be denied, leading to penalties. No separate deadline beyond the original due date is provided.

Checklist

What you need before filling it out

1

Taxpayer name & SSN/EIN

Social security card or EIN confirmation letter · Tax return header

⚠ Typos cause rejection✕ High
2

Requested extension end date

Calendar count of six months from original deadline · IRS deadline table

⚠ Wrong date leads to denial✕ Medium
3

Signature

Handwritten or electronic signature · Signature line on form

⚠ Missing signature invalidates✕ High

Before you submit

  1. 1Downloaded the latest edition for the correct tax year
  2. 2Entered correct SSN/EIN
  3. 3Checked that the extension end date is exactly six months later
  4. 4Signed and dated the form
  5. 5Attached any required explanatory statement
  6. 6Printed legibly if completing by hand
  7. 7Verified mailing address against the instructions
  8. 8Used certified mail or a trackable service
  9. 9Retained a copy of the signed form for records
  10. 10Confirmed postage and delivery date before the deadline

How to file this form

  1. 1Download Form 14446‑SO from IRS.gov
  2. 2Complete all required fields on the form
  3. 3Sign and date the form
  4. 4Prepare a brief statement if the IRS asks for a reason
  5. 5Place the form in an envelope with correct address
  6. 6Mail (or fax) the package before the original filing deadline
  7. 7Save the mailing receipt or fax confirmation

Known limitations

  1. 1Form only applies to sole proprietors and disregarded entities; using it for other entities is invalid
  2. 2No electronic filing option is provided by the IRS for this form
  3. 3The form does not guarantee an extension if filed late
  4. 4Instructions may change yearly; always verify the edition date

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 14446‑SO is still an active IRS form for the 2023 and 2024 tax years. Check the IRS website for the latest edition before filing.

What changed or needs a fresh check

  • Edition date – verify the form is for the tax year you are filing
  • Fee – no fee for this extension request
  • Mailing address – use the address in the current instructions
  • Signature line – must be signed by the taxpayer or authorized agent
  • Contact phone – optional, but include if you want IRS follow‑up

Form Preview

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Form 14446-SO page 2

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Quick Facts

Sole proprietors, single‑member LLCs treated as disregarded entities, and other individuals filing Schedule C.
The form captures the taxpayer’s name, SSN/EIN, tax year, reason for the extension request, and the date you want the extension to end.
Submit the form by the original filing deadline (usually April 15) to get an automatic six‑month extension; late submission may be denied.
Mail the completed form to the IRS address listed in the instructions for the specific tax year, or fax if the IRS provides a fax number for that year.
Errors or missing information can cause the IRS to reject the request, leaving you without an extension and exposing you to late‑filing penalties.
1. Download the current edition of Form 14446‑SO from IRS.gov. 2. Fill in taxpayer identification, tax year, and requested extension end date. 3. Sign and date the form. 4. Attach any required supporting statements. 5. Mail (or fax) to the address in the instructions before the original deadline.

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After you file

  1. 1Keep the signed copy and mailing receipt in your tax file
  2. 2Mark the new filing deadline on your calendar
  3. 3Monitor IRS correspondence for acceptance or denial notices
  4. 4If denied, prepare to file the return and pay any penalties promptly
  5. 5Update any tax software with the new deadline
  6. 6Retain all supporting statements for future audits

Sources

  • SRCForm 14446‑SO title and purposeIRS official form list
  • SRCEligibility (sole proprietor, single‑member LLC)IRS instructions for Form 14446‑SO
  • SRCExtension length (six months)IRS guidance on extension periods
  • SRCNo fee requirementIRS fee schedule for extension forms
  • SRCSignature requirementForm 14446‑SO instructions
  • SRCMailing address requirementIRS instructions for the specific tax year
  • SRCDeadline must be original filing dateIRS extension rules

Common confusion points

Confusion: Using 14446‑SO for corporations

Reason: Similar name to other extension forms

→ Check entity type first

Confusion: Thinking the form grants an automatic extension after the deadline

Reason: Extension must be received by original due date

→ Verify mailing date

Confusion: Believing a fee is required

Reason: No fee listed in instructions

→ Confirm fee section

Confusion: Mixing up the address for Form 4868 with 14446‑SO

Reason: Different IRS processing centers

→ Use the address in the current 14446‑SO instructions

Confusion: Assuming electronic signature is accepted

Reason: IRS requires a handwritten signature on paper copy

→ Sign manually

Workflow map

Related forms and next steps

4 signals

Before

Gather personal and business identification info

Current

14446-SO

After

File the actual Schedule C or Form 1040 by the new deadline

Often used with

No other form required for the extension request itself

⚠ If something goes wrong

  • Review IRS denial notice and consider filing Form 1120‑EX or contacting a tax professional

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Copyright & Licensing - US Government Forms

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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.
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