41-016: IA 1065 Iowa Partnership Return of Income 41-016 (2025)
Iowa · Iowa DOR · Used for tax years 2025
The 2025 IA 1065 is Iowa’s Partnership Return of Income. It reports partnership information, income, deductions, Iowa adjustments, and partnership distributive items from all sources and Iowa sources.
What you'll need
Have these records ready for your 2025 IA 1065:
- A complete copy of your federal return, excluding federal K-1s. You must file this copy with your Iowa return.
- Your federal Form 1065 and Schedule K figures for income and deductions.
- The partnership’s FEIN, address, business activity, NAICS code, and partner counts, including Iowa resident and nonresident partners.
- The pass-through representative’s name, address, and phone number.
- Iowa and everywhere receipts for Schedule E, the Business Activity Ratio schedule. This schedule must be completed.
- Payment amounts, including estimated payments, voucher payments, and any credit from the prior period.
Depending on your return, required attachments include:
- Amended return: IA 102.
- Income from disregarded entities: Schedule DE.
- Nonbusiness income: Schedule D.
- Composite and PTET credits claimed on line 34: Schedule CC.
- Audit election to pay on behalf of partners: IA 103.
- Underpayment of estimated tax penalty related to net Iowa PTET: IA 2220.
The form also calls for supporting schedules or statements for certain “Other” entries and partnership gross receipts.
How to file
You can eFile or mail your 2025 IA 1065. The form warns that you may be required to file electronically.
For mailing, send your return to:
Income Tax Return Processing
Iowa Department of Revenue
PO Box 9187
Des Moines IA 50306-9187
Include a complete copy of your federal return, excluding federal K-1s.
Sign the return by hand or use a digital signature with a digital certificate. Stamped or typed signatures are not accepted. Do not email your return.
Schedules are available at revenue.iowa.gov.
Common mistakes
- Using a typed or stamped signature. The return requires a handwritten signature or a digital signature with a digital certificate.
- Leaving out the federal return copy. A complete copy must accompany the Iowa return, excluding federal K-1s.
- Skipping Schedule E. The form says the Business Activity Ratio schedule must be completed.
- Omitting required attachments. For example, include IA 102 with an amended return and Schedule DE when reporting income from disregarded entities.
- Assuming no tax due means no late filing penalty. The form warns that a late filing penalty may apply even if no tax is due.
- Completing Part 5 without a PTET election. Check the box and complete Part 5 only if the partnership has elected, or is electing, entity-level taxation for the tax year. The election is irrevocable.
- Emailing the return. The form specifically says not to email it.
Questions people ask
Can a partnership elect to pay Iowa tax at the entity level?
Yes. Part 5 provides for a pass-through entity tax (PTET) election under Iowa Code section 422.16C. The form states that the election is irrevocable.
Can an overpayment be applied to the next return?
Yes. Line 43 lets you apply an overpayment to the next period’s return. Line 44 reports the remaining overpayment to be refunded.
Who can sign the return?
The signature area is for a partner/member or pass-through representative. The signer declares that they are authorized to act for the taxpayer.
Where can I get help or schedules?
Visit revenue.iowa.gov for schedules. For questions, call 515-281-3114 or 800-367-3388, or email idr@iowa.gov. Do not email your return.