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Form 944X: Adjusted Employer's Annual Federal Tax Return or Claim for Refund
IRS Form 944X is the Adjusted Employer's Annual Federal Tax Return or Claim for Refund, used by employers to correct errors on a previously filed Form 944. It must be filed if an error is discovered, and underreported tax requires filing by January 31 of the following year.
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IRS Form 944X - Adjusted Employer's Annual Federal Tax Return or Claim for Refund
IRS Form 944X is the Adjusted Employer's Annual Federal Tax Return or Claim for Refund, used by employers to correct errors on a previously filed Form 944. It must be filed if an error is discovered, and underreported tax requires filing by January 31 of the following year.
Risk Radar
Scan points- 1Failing to enter the correct Date You Discovered Errors means the correction may not qualify for interest-free treatment.
- 2Failing to check one box (but not both) in Part 1 of Form 944X.
- 3Not entering the earliest Date You Discovered Errors when reporting multiple issues.
- 4Omitting the required EIN, Name, or Address on page 1.
- 5Forgetting to sign IRS Form 944X on page 5.
Plain English
This form allows an employer to fix mistakes made when reporting their annual federal tax withholdings from employees. If the employer discovers a wrong amount was reported on a prior Form 944, they use this document to submit the correction to the IRS. It also serves as a way to claim a refund or abatement if too much tax was paid.
Submission Date
- Filing date: 2026-02-24 13:10:38
- 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 correcting errors on a previously filed Form 944 to file an adjusted employment tax return or claim for refund.
- Do not use Form 944-X if you have not filed any Form 944 for one or more years, in which case, file Form 944 instead.
- Check Instructions for line 42 when improperly classifying workers as independent contractors or nonemployees and now reclassifying them as employees.
Form selector
Use this form or another form?
Need to correct errors on a prior Form 944
Use this form to adjust previously filed wages, tips, tax withheld, or credits.
✓ Verify the specific line number being corrected.
Did not file any Form 944 for a year
File Form 944 for each of those years instead of using Form 944-X.
✓ Ensure you file one Form 944 per missing year.
Overreported Additional Medicare Tax (and amounts were withheld)
Use this form to correct overreports, provided the amount was actually withheld from employee wages.
✓ Confirm line 4a is checked if applicable.
Deadline or filing window
If an employer underreports tax, IRS Form 944X must be filed by the due date of the return period in which the error was found. This deadline is January 31 of the following year. If the due date falls on a Saturday, Sunday, or legal holiday, the filing can occur on the next business day.
Checklist
What you need before filling it out
Wages, tips, and other compensation
Dollar amounts entered to the left of the preprinted decimal point. · Page 1 (and subsequent pages)
Federal income tax withheld
Amount shown on line 27 (for penalty/interest calculation). · Page 1 (and subsequent pages)
Qualified sick and family leave wages
Amounts reported on Form 944 for specific date ranges. · Instructions p.4
Underreported Tax Amount Penalty Avoidance
Filing by the due date of the original Form 944. · Instructions p.7
Additional Medicare Tax Overreport
Employee share amounts must be included on line 4a if overreported. · Instructions p.9
Before you submit
- 1Ensure all five pages of Form 944-X are completed.
- 2Enter dollar amounts so that the whole number is to the left and cents are to the right of the preprinted decimal point.
- 3Always show an amount for cents, even if it is zero.
- 4Staple multiple sheets in the upper-left corner.
- 5Confirm you have entered the date you discovered the error.
- 6Provide a detailed explanation of the grounds and facts supporting the correction.
- 7Sign Form 944-X on page 5.
How to file this form
- 1Complete all five pages of IRS Form 944-X, ensuring dollar amounts are entered correctly with cents to the right of the decimal point.
- 2Determine whether you are filing an adjusted return or claiming a refund/abatement and complete the relevant sections.
- 3If correcting overreported Additional Medicare Tax, check box 4a on line 4a and keep employee written statements for your records.
- 4Calculate any resulting tax due (line 27) and ensure you have met all criteria to avoid FTP or FTD penalties by paying this amount by the filing date.
- 5Sign Form 944-X on page 5, stapling multiple sheets in the upper-left corner before mailing.
Known limitations
- 1Federal income tax withholding references on Form 944-X do not apply to employers located in American Samoa, Guam, the Commonwealth of the Northern Mariana Islands (CNMI), or the U.S. territories.
- 2Form 944-X cannot be used to correct overreported amounts of Additional Medicare Tax unless those amounts were not withheld from employee wages.
- 3The purpose of Form 944-X is generally for correcting errors on a prior Form 944, but it can also be used to file an adjusted return or claim a refund.
Field map
Compact field-by-field guide
Employer Info
1 items
Full legal name and Employer Identification Number.
Quarter
1 items
Select the calendar quarter this return covers.
Wages
1 items
Sum of all wages, tips, and other compensation paid to employees during the quarter.
Withholding
1 items
Total federal income tax withheld from employee paychecks.
SS & Medicare
1 items
Wages subject to Social Security tax (capped) and Medicare tax (uncapped).
Deposit
1 items
Indicate your deposit schedule: monthly, semiweekly, or next-day rule if over $100k.
Signatures
1 items
Must be signed by an authorized officer or agent of the employer.
Almost done reviewing the fields?
Fillable formOpen in Editor->The current edition is dated February 2026, and users should check IRS.gov/Form944X for the latest information regarding Form 944-X.
What changed or needs a fresh check
- Edition date — confirm the revision date reads February 2026.
- Mailing address — Not stated in the official source.
- Signature — complete and sign Form 944-X on page 5.
- Form Number — ensure the form is IRS Form 944-X.
- Page Count — verify all five pages are completed.
Quick Facts
Downloads
After you file
- 1Keep a copy of the filed Form 944-X.
- 2If filing due to overreported tax and applying the credit on Form 941, file Form 944-X more than 90 days before the period of limitations on the credit or refund for Form 941 expires.
- 3If filing in a quarter when you currently use Form 941 instead of Form 944, file Form 944-X within the first 2 months of that quarter (unless it is the year of expiration).
- 4When certifying on line 3 of Form 944-X, check the box to certify filing or future filing of Forms W-2 or Forms W-2c with the Social Security Administration (SSA), even if corrections do not change amounts shown on those forms.
Sources
- SRCInstructions p.1 — The official title is Adjusted Employer’s Annual Federal Tax Return or Claim for Refund.
- SRCInstructions p.1 — Lines 17a, 23, 24, 26a, 30, 31, 32, 39, and 40 are reserved for future use.
- SRCInstructions p.5 — If you overreported tax and apply the credit on Form 944 or Form 941, file Form 944-X soon after discovering the error but more than 90 days before the period of limitations expires.
- SRCInstructions p.7 — If filing using Form 941 instead of Form 944, file Form 944-X in the first 2 months of a quarter before expiration.
- SRCInstructions p.7 — In the year of the expiration of the period of limitations on Form 944, file Form 944-X at least 90 days before the expiration date.
- SRCInstructions p.8 — Check box on line 3 to certify filing or future filing of Forms W-2 or Forms W-2c with the SSA.
- SRCInstructions p.1 — Federal income tax withholding references do not apply to employers in American Samoa, Guam, CNMI, or U.S. territories.
Common confusion points
What is the deadline to file Form 944-X for an overreported tax?
The source mentions filing 'soon after you discover the error' and also gives a general rule.
→ File more than 90 days before the period of limitations on the credit or refund for Form 944 expires.
When must I file if my correction is related to Additional Medicare Tax?
Form 944-X can correct errors, but there are specific rules regarding how that error was handled (withheld vs. paid).
→ Ensure the amount corrected for Additional Medicare Tax was not withheld from employee wages if you want to use Form 944-X.
Do I have to file Form 944-X even if my corrections don't change amounts on W-2s?
The instructions specify that the certification on line 3 requires checking the box regardless of whether the tax adjustments impact the reported wages/tax amounts.
→ Check the box on line 3 to certify filing or future filing of Forms W-2 or Forms W-2c.
What is the deadline if I file in the year the period of limitations expires?
The general rule for overreported tax applies, but a specific instruction exists for the expiration year.
→ File Form 944-X at least 90 days before the expiration date.
If I use Form 941 instead of Form 944, when should I file Form 944-X?
The filing timing depends on whether you are in a regular quarter or the year the limitation expires.
→ File within the first 2 months of a quarter before expiration; if in the expiration year, file at least 90 days prior.
What happens to lines 17a, 23, 24, 26a, 30, 31, 32, 39, and 40?
These lines are reserved for future use because the period of limitations for correcting them has generally expired.
→ Confirm these lines are present on your Form 944-X; they are reserved for future use.
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Questions about IRS Form 944X
What is IRS Form 944X used for?
This form allows an employer to fix mistakes made when reporting their annual federal tax withholdings from employees. If the employer discovers a wrong amount was reported on a prior Form 944, they use this document to submit the correction to the IRS. It also serves as a way to claim a refund or abatement if too much tax was paid.
Who must file IRS Form 944X?
Employers must file IRS Form 944X when they discover an error on a previously filed Form 944. Employers in American Samoa, Guam, and the Commonwealth of the Northern Mariana Islands (CNMI) are also covered by this form.
What information does IRS Form 944X require?
The form collects identifying information like the Employer Identification Number (EIN), Name, and Address. Part 2 requires checking a box on line 3 and any applicable boxes on lines 4 and 5 to detail the tax matters being corrected.
When is IRS Form 944X due?
If correcting underreported tax, IRS Form 944X must be filed by the due date of the return for the return period in which the error was discovered (January 31 of the following year).
Where do I file IRS Form 944X?
The filing location depends on the submission method; if mailed, it must be properly addressed and postmarked by USPS or sent by an IRS-designated private delivery service (PDS) on or before the due date.
How do I complete IRS Form 944X?
First, enter your EIN, name, and address on page 1 (and subsequent pages). Next, check one box in Part 1 and ensure line 3 is checked in Part 2. The form must be completed across all five pages, and it must be signed on page 5.
What happens if IRS Form 944X is filed incorrectly?
If correcting underreported tax is filed late, a penalty may apply unless an amended Form 945-A is attached to Form 944X. Failure to follow guidelines can result in the IRS treating it as received only when actually received.
What is the deadline to file Form 944-X for an overreported tax?
The source mentions filing 'soon after you discover the error' and also gives a general rule. File more than 90 days before the period of limitations on the credit or refund for Form 944 expires.
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