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Form 8978: Partner's Additional Reporting Year Tax
IRS Form 8978 is Partner's Additional Reporting Year Tax, used by partners other than pass-through partners to calculate tax adjustments from Forms 8986 due to a BBA examination or AAR filing. The threshold for the substantial understatement penalty mentioned on this form is $5,000.
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IRS Form 8978 - Partner's Additional Reporting Year Tax
IRS Form 8978 is Partner's Additional Reporting Year Tax, used by partners other than pass-through partners to calculate tax adjustments from Forms 8986 due to a BBA examination or AAR filing. The threshold for the substantial understatement penalty mentioned on this form is $5,000.
Risk Radar
Scan points- 1Ensure you calculate interest correctly on Line 17 from the original due date of your income tax return (per section 6226(b)(3)).
- 2Failing to report on Form 8978 if you are an affected partner but not a reviewed year partner.
- 3Calculating Line 13 incorrectly by not subtracting Line 12 from Line 11.
- 4Omitting the total additional reporting year tax amount from Line 14.
- 5Failing to list penalties on Line 15 when Form 8986, Part V indicates they apply.
Plain English
This form helps partners figure out extra taxes owed in their reporting year because of changes made by an audited partnership (a BBA partner). Instead of reporting these adjustments directly on Form 3800, Form 8978 calculates the resulting change in tax for the first affected year and any years in between. This ensures all necessary tax impacts are accounted for.
Submission Date
- Filing date: 2024-12-31 22:12:15
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
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What this form is for
- Use this form when a partner (other than pass-through partners like partnerships or S corporations) receives Forms 8986 from a partnership due to a BBA examination or AAR filing, and needs to report the resulting additional reporting year tax.
- Do not use Form 8978 when you are a pass-through partner (such as a partnership or S corporation), unless your entity is both a taxable and pass-through partner and the adjustments relate to items that are taxable to the entity partner.
- Check Forms 8985 or 8986 instead when reporting adjustments for items that pass through to the partner's owners or beneficiaries.
Form selector
Use this form or another form?
You are a partnership, but you have adjustments related to BBA audits/AAR filings
Use this form to calculate tax from these pushout statements.
✓ Check line 14 of Form 8978 for the total change in tax.
You are an estate or trust that is a taxable partner and has adjustments received on Form 8986
Use this form to calculate tax for items that are taxable to the entity itself.
✓ Check Part I, line 1a/1b combination for corrected income.
You are an individual who needs to report a reduction in tax from 2022 reflected on Form 8978
The reduction is included in the total increase reported on line 14 but not in the interest calculation.
✓ Ensure you attach supporting statements for this adjustment.
Deadline or filing window
The filing trigger is receiving a Form 8986; the deadline is the partner’s reporting year. For instance, if an adjustment is furnished on January 15, 2025, and the partner has a calendar-year end, the reporting year is the 2024 tax year, requiring attachment to returns due April 15, 2025.
Checklist
What you need before filling it out
Partner's Additional Reporting Year Tax
Form 8978 · Part I
BBA Audit / AAR Filing
Source of review year adjustments · Form 8978 (lines 1a, 2)
Tax Year Ended (e.g., 03/01/2024)
Column (a) through (d) of Part I · Form 8978
Total income per original return or as previously adjusted
Line 1a · Part I
Adjustments to income from Schedule A (Form 8978)
Line 1b · Part I
Total deductions per original return or as previously adjusted
Line 3a · Part I
Before you submit
- 1Ensure the Name of partner(s) and Partner tax ID number are accurately filled out at the top.
- 2Verify that you have correctly identified the Source of review year adjustments (BBA Audit, AAR Filing, etc.).
- 3Confirm all four Tax Year Ended columns in Part I reflect the correct fiscal/calendar years.
- 4Double-check that Line 1b accurately reflects the adjustments from Schedule A (Form 8978).
- 5Verify that Line 2 correctly combines Line 1a and Line 1b to show the corrected income.
- 6Confirm Line 3a matches your total deductions per original return or as previously adjusted.
- 7Attach Form 8978, Schedule A (Form 8978), and any calculation statements when filing with your main tax return.
How to file this form
- 1Complete Part I of IRS Form 8978 by filling in the Name of partner(s) and Tax ID number.
- 2List the Source of review year adjustments (BBA Audit or AAR Filing) and enter the corresponding Tax Year Ended dates into columns (a) through (d).
- 3Calculate and enter your Total income per original return on Line 1a, followed by any resulting Adjustments to income from Schedule A on Line 1b.
- 4Combine Lines 1a and 1b to calculate and enter the corrected income on Line 2, and fill in your Total deductions per original return on Line 3a.
- 5Attach Form 8978 (and its completed Schedule A) along with all necessary calculation statements to your federal income tax return.
- 6File Form 8978 with a federal income tax return for the partner’s reporting year.
Known limitations
- 1Partners that are pass-through partners do not use Form 8978 to report changes to credits shown on Forms 8986; instead, they must file Form 8978.
- 2Any carryforward credit amounts after the first affected year and any intervening years must be reported on Form 3800 for the reporting year and as carryforwards in subsequent years.
- 3The partner's reporting year is defined as the tax year that includes the date the audited BBA partnership or BBA partnership filing an AAR furnished Forms 8986 to its partners.
Field map
Compact field-by-field guide
Entity Info
1 items
Name and taxpayer ID of the entity claiming the credit.
Credit Info
1 items
Type of credit or incentive being claimed.
Calculation
2 items
The base amount used to calculate the credit.
Calculated credit amount after applying formulas and limitations.
Certification
1 items
Detailed breakdown supporting the credit calculation.
Signatures
1 items
Sign and date the form.
Almost done reviewing the fields?
Fillable formOpen in Editor->The current edition of Form 8978 is dated January 2023, and instructions are reviewed through December 2024. For the latest information regarding developments related to Form 8978, filers should check IRS.gov/Form8978.
What changed or needs a fresh check
- Edition date — confirm the revision reads January 2023.
- Instructions review date — confirm instructions are dated December 2024.
- Mailing address — Not stated in the official source (but IRS website is listed).
- Signature — The form requires a signature, but the specific location is not detailed in the provided excerpts.
Quick Facts
Downloads
After you file
- 1Attach Form 8978, Schedule A (Form 8978), and any calculation statements to the federal income tax return being filed.
- 2If a penalty was applicable, include that in the payment accompanying the filing.
- 3For an example where a reduction in tax is reported on line 14 of Form 8978, the partner must report this amount on the appropriate line of their Form 1040.
- 4When reporting multiple adjustments (like AAR and audit-related), attach calculation statements showing how the final net amount was derived.
Sources
- SRCInstructions p.1 — Partners other than pass-through partners use Form 8978 and Schedule A (Form 8978) to calculate tax from adjustments shown on Forms 8986 originating from a BBA partnership due to a BBA examination or AAR filing.
- SRCInstructions p.1 — Any carryforward credit amounts after the first affected year and any intervening years are reported on Form 3800 for the reporting year and as carryforwards (if appropriate) on Form 3800 in years after the reporting year.
- SRCInstructions p.2 — Every partner (except pass-through partners) that receives a Form 8986 from a pass-through entity must file Form 8978 to report any additional reporting year tax.
- SRCInstructions p.2 — A reviewed year partner or affected partner must file Form 8978 with a federal income tax return for the partner’s reporting year.
- SRCInstructions p.3 — The reduction in tax reflected in column (b) of Form 8978 is included in the total increase to tax reported on line 14, but it is not included in the interest calculation.
- SRCInstructions p.6 — Instructions for Form 8978 are provided by the Department of the Treasury Internal Revenue Service and this form has a revision date of December 2024.
Common confusion points
Who needs to file Form 8978?
Every partner, except pass-through partners, who receives a Form 8986 from a pass-through entity must file it.
→ Check if you are a non-pass-through partner receiving a Form 8986.
What is the 'partner's reporting year'?
It is the tax year that includes the date an audited BBA partnership or AAR filing furnished Forms 8986 to the partners.
→ Confirm this date aligns with when you received the Forms 8986.
How do I report a decrease in tax?
The reduction in tax reflected in column (b) of Form 8978 must be included in the total increase to tax reported on line 14, but it is not included in the interest calculation.
→ Verify that your decrease amount is correctly placed on line 14.
What if my corrected taxable income differs from Line 2 minus Line 4?
A separate statement showing how the corrected taxable income was figured must be included, and this corrected amount must be entered on line 5 of Form 8978.
→ Ensure your calculation matches the requirement before entering the final figure.
How do I handle carryforward credits after the first year?
These amounts are reported on Form 3800 for the reporting year and should be reported as carryforwards (if appropriate) in years following the reporting year.
→ Check if you need to report these separately on Form 3800.
What do I attach when filing with my tax return?
Attach Form 8978, Schedule A (Form 8978), and calculation statements detailing the tax and penalty calculations.
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Schedule A (Form 8978) — This schedule is used to complete and accompany Form 8978.
Questions about IRS Form 8978
What is IRS Form 8978 used for?
This form helps partners figure out extra taxes owed in their reporting year because of changes made by an audited partnership (a BBA partner). Instead of reporting these adjustments directly on Form 3800, Form 8978 calculates the resulting change in tax for the first affected year and any years in between. This ensures all necessary tax impacts are accounted for.
Who must file IRS Form 8978?
Every partner other than pass-through partners that receives a Form 8986 from a pass-through entity must file IRS Form 8978 to report additional reporting year tax.
What information does IRS Form 8978 require?
Form 8978 collects the increase or decrease to tax on Line 13 (calculated by subtracting Line 12 from Line 11). It also requires inputting the total additional reporting year tax on Line 14 and listing any applicable penalties on Line 15.
When is IRS Form 8978 due?
A reviewed year partner or affected partner must file IRS Form 8978 with a federal income tax return for the partner’s reporting year. For example, if an adjustment is furnished on March 1, 2024, and the partner has a calendar-year end, the reporting year is the 2024 tax year.
Where do I file IRS Form 8978?
The instructions state that the form must be filed with a federal income tax return for the partner’s reporting year. Specific service center routing rules are not detailed in the provided excerpts.
How do I complete IRS Form 8978?
First, calculate the increase or decrease to tax by subtracting Line 12 from Line 11 and entering the result on Line 13. Next, sum up these amounts into the Total additional reporting year tax on Line 14. If penalties apply per Form 8986 Part V, list them on Line 15 before signing.
What happens if IRS Form 8978 is filed incorrectly?
Failing to report the additional reporting year tax correctly can result in penalties, such as the substantial understatement penalty mentioned on Form 8978 (if it applies).
Who needs to file Form 8978?
Every partner, except pass-through partners, who receives a Form 8986 from a pass-through entity must file it. Check if you are a non-pass-through partner receiving a Form 8986.
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