
What IRS Form 1065 (2021) Is For
IRS Form 1065 (2021) is the annual information return used by partnerships to report partnership income, deductions, gains, losses, and credits to the Internal Revenue Service. The form helps the IRS match information returns to each partner’s individual income tax return. Partnerships generally do not pay income taxes directly. Instead, they pass through their profits and losses to particular partners, who report their partner’s share of income and deductions on their personal tax returns or self-employment tax forms.
Every domestic partnership—including general partnerships, limited partnerships, and limited liability companies treated as partnerships for federal tax purposes—must file Form 1065. Filing requirements apply even if a partnership earns no income but has expenses or credits to report for the tax year. The return of partnership income provides the IRS with details about each partner’s ownership, account balances, and financial activity throughout the calendar year.
When You’d Use Form 1065 for 2021 (Late or Amended Filing)
You would file a late 2021 Form 1065 if your partnership missed the original due date of March 15, 2022, or the extended deadline of September 15, 2022. Filing after the deadline can result in penalty assessments and interest charges.
Common reasons for late or amended filing include:
- Unfiled Returns: You received an IRS notice about a missing or unfiled partnership tax return.
- Payment Errors: You discovered unpaid business taxes or unreported partner payments.
- Incorrect Allocations: Partner’s shares of income or deductions were misreported.
- Missed Deductions: You failed to include allowable deductions or credits on the original return.
Late filing penalties are $210 per partner, per month (or part of a month), up to a maximum of 12 months. For example, a general partnership with three individual partners filing six months late would owe $3,780. Partnerships that fail to file entirely can also face additional penalties for missing information returns or forms.
For amended returns, partnerships file Form 1065-X, Amended Return or Administrative Adjustment Request (AAR), when correcting income, deductions, or partner allocations. Amended filings do not produce refunds because partnerships do not pay income taxes at the entity level, but they help ensure accuracy in each partner’s individual tax return.
Key Rules Specific to 2021
Several unique rules applied to the 2021 tax year that affected how partnerships reported income, credits, and deductions:
- Schedules K-2 and K-3: These replaced specific lines on Schedule K and Schedule K-1 for reporting foreign activities and international tax details.
- Temporary 100% Meals Deduction: Certain business meal expenses paid in 2021 were fully deductible.
- Employee Retention Credit: Partnerships could claim credits for qualified wages paid before October 1, 2021.
- PPP Loan Forgiveness: Forgiven loans created tax-exempt income but affected partner basis and capital accounts.
- Section 706(d) Rules: Ownership changes required specific allocation adjustments based on income earned during the year.
For complete details on wage reporting, withholdings, and unemployment tax filings, see our guide to Business Income Tax Forms.
Step-by-Step (High Level)
To properly file Form 1065, partnerships should follow these general steps:
- Gather Records and Transcripts: Collect financial statements, Schedule K-1 data, balance sheets, and partner capital account details. Request IRS account transcripts to confirm any previous filings.
- Complete Form 1065: Use the correct version for the 2021 tax year and ensure accurate allocations of partnership income, deductions, and credits.
- Prepare Required Schedules: Include Schedules K-1, L, M-1 or M-3, and K-2/K-3, if applicable. These schedules show each partner’s share of profits, capital gains, and losses.
- File the Return: Calendar-year partnerships must file by the 15th day of the third month after the end of the year, usually March 15. Partnerships with more than 100 partners must e-file; smaller partnerships may mail the return to the IRS.
- Distribute K-1s: Provide each partner with an accurate Schedule K-1 that shows their income, deductions, and credits.
- Retain Copies: Keep complete copies of the annual return, supporting documents, and IRS correspondence for a minimum of three years.
Common Mistakes and How to Avoid Them
Avoiding these filing errors can reduce delays, penalties, and audit risk:
- Missing Schedules: Always include Schedule M-1 or M-3 to reconcile book income and taxable income.
- Incorrect Allocations: Verify each partner’s ownership percentage and profit allocation before filing.
- Incomplete K-1s: Ensure every partner receives a complete and correct Schedule K-1.
- Incorrect Accounting Method: Most partnerships use the cash method unless required by law to use the accrual method.
- Unsigned Forms: The return must be signed by a general partner or LLC member.
- Ignoring E-File Rules: Partnerships with 100 or more partners must e-file or face penalties of $100 per missing K-1.
Learn more about how to avoid business tax problems in our guide on How to File and Avoid Penalties.
What Happens After You File
After submission, the Internal Revenue Service may take several weeks to process the return.
- Processing Time: Most partnership returns require six to eight months for complete processing, with longer processing times if selected for manual review.
- IRS Notices: The IRS may contact you for additional details or clarification on income, deductions, or credits.
- Penalty Payments: You can pay penalties or interest through electronic funds transfer, mail, or by setting up an installment agreement using Form 9465.
- Audit Procedures: Partnership audits fall under the Centralized Partnership Audit Regime (BBA). The designated partnership representative is responsible for handling all communications with the IRS.
FAQs
What is IRS Form 1065 (2021) and who must file it?
IRS Form 1065 (2021) is the U.S. Return of Partnership Income used to report partnership income, deductions, and credits to the IRS. All domestic partnerships with two or more people who carry on a business must file this annual return, even if the partnership had no income during the tax year.
How does partnership income affect individual income tax returns?
Partnership income passes through to each partner’s individual tax return. Partners report their partners’ share of income, deductions, and credits on their personal income tax returns and pay self-employment tax, Medicare taxes, and social security contributions based on their share of profits.
What are the filing requirements for Form 1065 U.S.?
Form 1065 U.S. must be filed by the 15th day of the third month after the close of the partnership’s tax year—usually March 15 for calendar year partnerships. Late filings may result in penalties and interest charges for each partner.
How are capital gains and net income reported on a partnership tax return?
Partnerships report capital gains, net income, and other taxable items on Schedule K and distribute each partner’s share on Schedule K-1. These forms show how profits, losses, and credits are allocated based on ownership percentages and partnership agreements.
What information returns are attached to an amended partnership tax return?
An amended return must include updated information returns, such as corrected Schedules K-1, K-2, and K-3. These forms reflect changes in income, partner allocations, or other financial details from the prior submission. Partners should review amended documents for accuracy and adjust their personal filings as needed
For more resources on filing or understanding prior-year IRS forms, visit our Form Summaries and Guides Library.


