IRS Form 1065-X (2024): Amended Partnership Filing Guide

Partnerships use IRS Form 1065-X (2024) to correct a previously filed Form 1065, Form 1065-B, or Form 1066 when not filing electronically. BBA partnerships also use it to submit an Administrative Adjustment Request (AAR). It applies to partnership tax years beginning on or after January 1, 2023.

Late Filers

Partnerships that discover errors on a previously filed return may submit Form 1065-X on paper, provided the filing falls within the applicable three-year limitation period.

Multiple Income Sources

Partnerships with income from multiple sources must ensure all corrected items are accurately allocated across the amended return and any revised partner schedules.

Itemizing Deductions

If deductions such as depreciation or business expenses were miscalculated on the original return, Form 1065-X is the paper filing option for reporting corrected figures.

Claiming 2024 Credits

Partnerships correcting previously unreported or miscalculated credits for tax year 2024 must identify the specific credit, report the corrected amount, and attach any required schedules.

IRS Compliance

Filing Form 1065-X demonstrates that the partnership is proactively correcting its reporting record, which supports compliance standing and reduces exposure to penalties from inaccurate filings.

Citizens Abroad / Military

Partner-level adjustments on corrected Schedule K-1s or Forms 8986 must account for foreign income rules for U.S. citizens abroad or on active military duty.

Follow the steps below to complete and submit Form 1065-X for tax year 2024. Some steps apply specifically to BBA partnerships and are noted accordingly.

1. Gather Your Documents Before Starting

Collect the original Form 1065 and all associated schedules, partner agreements, depreciation records, and any IRS correspondence. Having complete documentation on hand before you begin reduces errors and supports the accuracy of every correction you report.

2. Choose the Correct Filing Status

The entire filing process depends on whether the partnership is subject to BBA centralized partnership audit rules or non-BBA. Partnerships must comply with BBA rules for tax years starting after January 1, 2018, unless they elect out. BBA partnerships request administrative adjustments. Non-BBA partnerships file amended returns and corrected Schedule K-1s, while BBA partnerships request and follow centralized audits.

3. Report All Income on the Correct Lines

Use Part II of the form to list every change from the original return, including corrections to ordinary business income, rental income, capital gains, and any other income types. For tax year 2024, verify that all income items align with the line numbers in the August 2023 revision of Form 1065-X, as earlier revisions use different line assignments.

4. Calculate Corrected Partnership Income and Deductions

Recalculate all partnership-level income, deductions, gains, losses, and credits affected by the corrections. Partnerships file information returns and do not compute AGI the way individual filers do on Form 1040. Accurate recalculation of these figures controls the final allocation amounts reported to each partner on their corrected schedule or statement.

5. Choose Your Deductions and Apply Exemptions

Identify all of the deductions that were reported incorrectly on the original return and enter the corrected amounts in Part II. For BBA partnerships (2024 Only), if the corrections result in an imputed underpayment, calculate that amount and attach Form 8980 if requesting any modification to the standard imputed underpayment calculation.

6. Claim the 2024-Specific Credit (2024 Only)

See the amendment that corrects an omitted 2024 tax credit, report the corrected maximum, and attach all schedules. Each partner needs Form 8986 to adjust BBA partnerships. Pass-through partners use Forms 8985 and 8986, while non-pass-through affiliates use 8978.

Missing W-2s or Tax Records for 2024?

Partnerships that correct a previously filed return may find that the original records or supporting schedules are no longer readily available. IRS transcript services and third-party records can help reconstruct the information needed to complete an accurate amended return.

IRS Wage & Income Transcript

This transcript contains third-party reported income data submitted to the IRS, including Forms W-2, 1098, 1099, and 5498, and can help verify income figures reported by or to the partnership.

IRS Tax Account Transcript

A tax account transcript shows account activity such as payments, penalties, interest, and changes made after the original return was filed, giving the partnership a reliable reference.

Social Security Administration

A tax return transcript shows line items from the original return as filed, allowing the partnership to compare reported figures against corrected amounts when the partnership's own copy is unavailable.

Contact Prior Employers

Accounting firms, bookkeepers, and payroll providers that prepared or supported the original return may retain records that can help the partnership reconstruct the documentation needed for the amended filing.

Correcting a previous return quickly is crucial. The IRS charges $245 per partner per month (up to 12 months) for late partnership returns in 2025.

The errors below are the most frequent causes of IRS processing delays, rejected amended returns, and missed partnership-level adjustments.

• Using the wrong tax year form — The IRS requires the August 2023 revision of Form 1065-X for 2024 tax years, and submitting an older version may delay processing.
• Missing Schedule M / 2024-specific credit — Omitting required schedules or failing to attach supporting forms for corrected credits will trigger IRS correspondence and extend processing times.
• Wrong filing status label — Checking the wrong box in Part I, based on BBA or non-BBA status, routes the filing through the wrong IRS procedures entirely.
• Applying Pease limitations incorrectly — Miscalculating the Pease limitations on itemized deductions or applying outdated rules can result in inaccurate partner allocations and further corrections.
• Treating unemployment compensation as partially tax-free — Incorrectly reporting the tax treatment of partner unemployment benefits may still necessitate a subsequent correction and adjustment to partner schedules. 
• Assuming a refund is still available — The three-year limitation period for requesting a downward adjustment may expire earlier than expected, making it important to confirm eligibility before filing.
• Missing or incorrect Social Security numbers — Invalid or missing partner identification numbers can delay processing and prevent the IRS from accurately matching corrected Schedule K-1 forms submitted.
• Unsigned return — BBA filings require the partnership representative’s signature, while non-BBA filings need an authorized partner’s signature for IRS acceptance and processing.
• Missing attachments — Failing to attach required forms like Form 8980 or corrected schedules will result in incomplete processing and potential IRS inquiries.

What is IRS Form 1065-X (2024) used for?

Partnerships use IRS Form 1065-X (2024) to correct mistakes on previously filed Forms 1065, 1065-B, or 1066 for tax years beginning after January 1, 2023. BBA partnerships also use the form to submit administrative adjustment requests that process partnership-level corrections under centralized IRS audit procedures.

Can I still file an amended 2024 partnership return?

Yes, partnerships may still file Form 1065-X for tax year 2024 if the three-year limitation period remains open. The deadline is the later of the filing date and the original due date, without extensions. Calendar-year partnerships generally still qualify, even though the original due date was March 17, 2025.

What is the difference between an amended return and an AAR?

Non-BBA partnerships file amended returns using traditional correction procedures and issue corrected Schedule K-1 forms directly to partners. BBA partnerships, instead, file an administrative adjustment request that processes adjustments at the partnership level through centralized audit rules, with corrections passed to partners using Form 8986 and related reporting procedures.

Can Form 1065-X be e-filed?

No, Form 1065-X cannot be electronically filed; it must be mailed to the IRS service center that processed the original return—partnerships filing amended returns electronically instead of submitting corrected Forms 1065. BBA partnerships generally file electronic Administrative Adjustment Requests using Form 8082 instead of Form 1065.

What happens after Form 1065-X is filed?

After Form 1065-X is submitted, the IRS reviews the corrections and updates the partnership’s tax records accordingly. Non-BBA partners may need to amend personal returns using corrected Schedule K-1 forms. BBA push-out elections require eligible partners to report adjustments using Forms 8986, 8985, and 8978, where applicable.

What is an imputed underpayment, and how is it paid?

An imputed underpayment is additional tax assessed at the partnership level when a BBA administrative adjustment request creates an upward adjustment without a push-out election. Partnerships calculate the amount, may request modifications using Form 8980, and submit payment through EFTPS or by check properly labeled for IRS processing.

How are late-filing penalties calculated for partnerships?

For partnership returns due in 2025, the IRS charges a penalty of $245 per partner for each month or partial month that the return remains late. Penalties may continue for up to 12 months. Larger partnerships and longer filing delays significantly increase the total amount owed to the IRS.