Form 1065-X Checklist for Tax Year 2023
Year-Specific Uniqueness
For tax years beginning on or after January 1, 2023, the August 2023 revision of Form 1065-X requires BBA partnerships filing AARs to apply centralized audit procedures under sections 6221 through 6241. The form distinguishes between cash contributions (line 13a) and non-cash contributions (line 13b)—a redesign reflecting enhanced partnership tracking for the reviewed year.
Year-Specific Programs Applying to 2023
The Bipartisan Budget Act centralized partnership audit regime applies to all partnerships with tax years beginning after 2017 unless an eligible partnership elects out on Schedule B-2 of the original Form 1065. For 2023 tax years, Form 1065-X does not incorporate energy credit changes or cryptocurrency reporting specific to this form. No section 41 research credit, stimulus reconciliation, or ACA shared responsibility payment items are unique to Form 1065-X filing for 2023.
Ten-Step Checklist: Form 1065-X (Tax Year 2023)
Step 1: Determine Partnership Filing Status
Verify whether the partnership is subject to BBA procedures (tax years after 2017) or TEFRA procedures (tax years before 2018). If BBA applies, confirm that the partnership representative or designated individual is authorized to sign, as per Section 6223. For 2023 returns, only the August 2023 revision of Form 1065-X is correct.
Step 2: Classify Filing Type in Part I
For tax years beginning in 2023, check the appropriate box: BBA AAR, non-BBA amended return, or partnership-partner amended return related to IU modification. Do not check TEFRA AAR (applies only to tax years beginning before 2018).
Step 3: Gather Supporting Documentation
Collect the original Form 1065, Form 1065-B, or Form 1066; all prior-year schedules; amended Schedules K-1 or K-3 (if applicable); and documentation supporting each line-item adjustment. Write “Copy Only—Do Not Process” on any reproduced prior-year forms.
Step 4: Complete Part II: Line Item Adjustments
Enter the original reported amount (column a), net change (column b), and corrected amount (column c) for each adjusted item. If contributions are adjusted, report separately: line 13a for cash contributions and line 13b for noncash contributions (redesigned for 2023).
Step 5: Calculate Imputed Underpayment (IU) if Applicable
If filing a BBA AAR and adjustments result in an IU, group adjustments are made by reallocation, residual, creditable expenditure, and credit groupings. Net positive adjustments within each grouping, then multiply total netted partnership adjustments by the highest tax rate in effect for the reviewed year under section 1 or 11.
Step 6: Complete Part IV: Imputed Underpayment Section
Report the IU amount on line 1, or zero if adjustments do not result in an IU. Add prepaid estimated interest and penalties to line 2. Enter payment on line 3. For BBA partnerships paying the IU, this section must be completed, regardless of whether the partnership elects to push out.
Step 7: Attach Required Forms for BBA Partnerships
If making an election under section 6227(b)(2) to push out adjustments, attach Form 8985 (Pass-Through Statement) and Form 8986 (Partner’s Share of Adjustments). If adjustments do not result in an IU, Forms 8985 and 8986 are still required. If the partnership does NOT make the push-out election and is instead paying the IU while applying modifications under section 6227(b)(1), attach Form 8980.
Note: Modifications cannot be applied in conjunction with a push-out election; per section 6227(b)(2), if push-out is elected, any modifications applied to the IU are disregarded.
Step 8: Complete Part V: Explanations
For each line item adjusted in Part II, enter the line number and provide a detailed explanation of the change, supporting computation, and reason for adjustment. Show the Schedule K-1 box number and code used to report each item. Explain how the IU was calculated and how modifications were applied (if applicable).
Step 9: Sign and Date by Authorized Party
BBA partnerships: The partnership representative or designated individual (if the PR is an entity) must sign. Non-BBA partnerships: Any partner or LLC member may sign. Include title, printed name, and date. If a receiver or trustee signed, attach court authorization documentation.
Step 10: Assemble and File by Statute
File Form 1065-X within three years after the later of (a) the date the original Form 1065 was filed or (b) the last day for filing the return (excluding extensions). Do not file after a notice of administrative proceeding is mailed. Include all attachments (supporting schedules, Forms 8985–8986, Form 8980 if applicable, Form 8302 if $1 million refund is requested). See the IRS Where to File page for the 1065-X paper-filing address.
Line Changes for 2023
Part II, Line 13a: Prior year wording used “Contributions.” The 2023 wording changed to “Cash contributions.” This represents a redesigned provision.
Part II, Line 13b: Prior year combined contributions with line 13a. The 2023 instruction added “Noncash contributions” as a new line. This represents an added provision.
Part II, Lines 13c–13e: Prior year used lines 13b–13d. The 2023 instruction renumbered subsequent items. This represents an updated provision.
Form-Specific Limitations
BBA Partnerships Cannot File Traditional Amended Returns: Partnerships subject to BBA procedures must file an AAR, not an amended Form 1065 with amended Schedules K-1, unless specific IRS guidance permits otherwise. Failure to use the correct procedure may result in the return not being processed as intended.
Adjustments Affecting Partner Tax Liability: Adjustments that result in an IU are calculated and paid at the partnership level using the highest applicable tax rate; reviewed-year partners cannot claim the adjustment individually in the year of the original return. If the partnership elects to push out, the reviewed-year partners must report adjustments and any resulting tax on their reporting-year return or Form 8978.
Key 2023 Instruction Notes
The August 2023 revision does not contain year-specific energy credits, ARPA expansions, or EIP reconciliation applicable to Form 1065-X. The centralized partnership audit regime (CPAR) requires all partnerships filing 2023 returns (unless electing out under section 6221(b)) to use the AAR framework, making traditional amended returns unavailable for CPAR entities. The contributions line split (cash vs. noncash) applies to all adjustments reported for 2023 tax years on Form 1065-X.
Need Help With Your Tax Filing?
If you’re missing tax documents or want to ensure the numbers you enter match IRS records, we can help.
We offer:
- Full IRS transcript retrieval (Wage & Income + Account)
- Professional tax form review
- Preparation & filing support
- Tax relief options if you owe the IRS
Call now before filing: (888) 260-9441
Fast transcript pull available
This checklist is for educational purposes only and does not constitute tax or legal advice. Always review official IRS instructions and consult a qualified professional for guidance.
