Where to Send Form 1065: Quick Answer
Form 1065 goes to the U.S. Internal Revenue Service (IRS), not the Australian Taxation Office (ATO). Eligible partnerships can e-file. Paper returns must be mailed to the address listed in the current IRS instructions for Form 1065.
The right address depends on:
- Where the partnership's principal business is located
- Year-end asset and Schedule M-3 position
- Delivery method
- Whether a payment is enclosed
This guide covers choosing the address, preparing the package, proving delivery, and meeting the deadline.
Key Takeaways
- Use the latest IRS "Where to File" page, not an address from a prior year.
- The partnership files one Form 1065; each partner gets a Schedule K-1.
- Australian businesses should confirm a U.S. filing obligation first.
- Keep the e-file acceptance or paper delivery proof with your tax records.
Form 1065 Filing Method: Paper or Electronic?
Confirm Form 1065 is the correct return
Generally, every U.S. domestic partnership files Form 1065 unless it neither receives income nor incurs deductible expenditures or credits for federal tax purposes. Certain foreign partnerships with U.S.-source or effectively connected income file too, even when the business and all members are outside the United States.
Federal tax classification is what matters here, not how the entity is registered under Australian law. For U.S. LLCs:
- A multi-member LLC defaults to partnership treatment and generally files Form 1065.
- A single-member LLC defaults to disregarded-entity status.
- An entity-classification election can switch either to corporate treatment.
Confirm your classification before preparing anything. Form 1065 includes Schedule K, and each partner receives a Schedule K-1 reporting their share of income, deductions, and credits. Partners use the K-1 on their own returns. It is not a substitute for the partnership return.
Choose between e-filing and paper filing
Under 26 CFR §301.6011-3, e-filing is mandatory if the partnership must file 10 or more returns of any type in the calendar year, or has more than 100 partners during the tax year. The 10-return count includes income, employment, excise and information returns, but not schedules filed with Form 1065.
A simple decision path:
- Count the partnership's required returns and partners.
- If either threshold is met, e-file.
- If not, check whether your software or preparer supports e-filing.
- Paper filing is available when no mandate applies or an exception (such as an undue-hardship waiver or religious exemption) is granted.
The practical difference is proof. E-filing gives you an electronic acceptance record. Paper filing needs a correctly addressed package, a timely postmark, and retained delivery evidence.
Where to Mail a Paper Form 1065
Find the current IRS address
Open the latest Instructions for Form 1065 and the IRS "Where to File" page before mailing. For the 2025 return, routing depends on the principal business location:
| Principal business location | Year-end assets / Schedule M-3 | Address |
|---|---|---|
| Eastern and southeastern group (for example New York, Georgia, Illinois, Ohio, Virginia) | Under $10 million, no Schedule M-3 | Department of the Treasury, Internal Revenue Service, Kansas City, MO 64999-0011 |
| Same group | $10 million or more, or Schedule M-3 filed | Department of the Treasury, Internal Revenue Service, Ogden, UT 84201-0011 |
| Western and central group (for example California, Texas, Florida, Washington) | Any amount | Department of the Treasury, Internal Revenue Service, Ogden, UT 84201-0011 |
| Foreign country or U.S. possession | Any amount | Internal Revenue Service, P.O. Box 409101, Ogden, UT 84409 |
The state group lists above are abbreviated. Check the full list on the IRS page, which was last reviewed 30 January 2026, and confirm the address for your tax year before sealing the envelope.
An Australian partnership with its principal business in Australia uses the foreign-country address. Don't guess from an Australian postcode.
For private delivery services, use the street address of the processing centre instead: Ogden is 1973 Rulon White Blvd., Ogden, UT 84201, and Kansas City is 333 W. Pershing, Kansas City, MO 64108.
Check whether payment changes the destination
IRS postal addresses often vary depending on whether a payment is enclosed. Private delivery returns go to the processing centre street address with or without payment. Follow the payment instructions that apply to Form 1065 rather than assuming one address fits both.
Partnerships generally file an information return, but other federal or state obligations can still involve payments. Never send a payment or voucher to an address copied from an unrelated form.
Mail, track, and retain evidence
- Make a complete copy or scan of the return and all schedules.
- Use registered or certified mail, or a designated private delivery service.
- Keep the postmark, receipt, or tracking record.
- File the delivery confirmation with the return.
Timely-mailing treatment under 26 CFR §301.7502-1 requires the envelope to be properly addressed to the correct filing office. A carrier's delivery confirmation proves delivery only. It does not show the IRS processed the return, so keep both where available.
What to Prepare Before Sending Form 1065
Assemble the return package
Verify these items before submission:
- Partnership legal name and address
- EIN
- Principal business activity and business code
- Tax year and accounting method (cash, accrual, or other)
- Income, deductions, and total assets
- Partner details and financial records
Attach one Schedule K-1 for every person who was a partner at any time during the year. Schedule K-2 and K-3 report international tax items, and are required unless a domestic filing exception applies. Foreign activity, foreign partners, or foreign-source income usually means you need them.
Complete a final accuracy check
- Reconcile the return with the partnership's books.
- Confirm partner allocations add up.
- Check all pages and statements are attached.
- Confirm a partner or LLC member has signed.
- Match the name, address, and EIN across documents.
- Mark the right box if the return is initial, final, amended, or reflects a name or address change.
- Confirm you are using the correct tax-year form version.
Keep separate filings separate
Form 1065 does not replace state returns, foreign-country filings, partner-level returns, withholding forms, or other federal forms. Australian obligations need separate assessment with an adviser who understands both systems. The ATO publishes its own partnership tax return, which is a different document. Don't put an ATO return in the IRS envelope.
Form 1065 Deadlines, Extensions, and Filing Risks
Identify the filing deadline
Form 1065 is generally due on the 15th day of the third month after the tax year ends. A Saturday, Sunday, or legal holiday moves it to the next business day. For calendar-year 2025, 15 March 2026 fell on a Sunday, so the deadline was 16 March 2026. Fiscal-year partnerships count from their own year-end.
Use an extension correctly
Form 7004 gives an automatic 6-month extension to file and must be submitted by the regular due date. It does not extend time to pay.
Partnerships whose books are kept outside the U.S. and Puerto Rico generally get an automatic extension to the 15th day of the sixth month without filing Form 7004, with a possible additional 3 months on request.
An extension doesn't excuse you from preparing partner information or meeting other separate obligations.
Understand late-filing and correction risks
Per the 2025 Form 1065 instructions, the late-filing penalty is $255 per partner for each month or part-month, up to 12 months. Failing to furnish correct Schedule K-1 or K-3 forms costs $340 per failure, subject to annual caps. Reasonable-cause relief is available.
If something goes wrong:
- Mailed to the wrong address: Keep your mailing proof and get guidance before resending. A wrong-office mailing is not treated as automatically timely.
- E-file rejected: Publication 4163 gives a 10-day perfection period. If you must e-file but can't, contact the e-Help Desk before filing on paper.
- Late or needs amendment: Follow current IRS instructions rather than sending duplicate returns.
Special Guidance for Australian and Foreign Partnerships
Confirm whether a U.S. filing obligation exists
Having U.S. customers, contractors, or transactions doesn't automatically trigger Form 1065. The key test is whether the partnership has effectively connected income or U.S.-source gross income. Foreign partnerships may skip filing in two situations:
With U.S. partners, all of the following must apply:
- No effectively connected income
- U.S.-source income of $20,000 or less
- Under 1% of each partnership item allocable to direct U.S. partners
- Not a withholding foreign partnership
No U.S. partners, all of the following must apply:
- No effectively connected income
- Not a withholding foreign partnership
- Required Forms 1042 and 1042-S filed
- Each partner's liability fully satisfied by withholding at source
Understand the cross-border filing package
Foreign partners often create extra withholding and reporting layers. Section 1446 withholding may apply to effectively connected income allocable to foreign partners, using Forms 8804, 8805, and 8813. Separate reporting under sections 1441 and 1442 can apply on Form 1042 and 1042-S.
Schedules K-2 and K-3 are often required as well. The foreign-filer address differs from the domestic ones, so use the current instructions rather than guessing.
Know when to obtain professional help
Get cross-border tax help if you have:
- Foreign partners or U.S. operations
- Activity in multiple states
- A restructuring underway
- Missing prior-year returns
- Unclear entity classification
- Doubt about the mailing address or e-file requirement
VJM Global supports Australian and other international businesses with tax compliance and accounting outsourcing. The team works with U.S. compliance requirements, including Form W-8/W-9 handling and 1042-S filings. A review can't guarantee a particular IRS outcome, but it can catch classification and address errors before they cost you.
Frequently Asked Questions
Where do you send Form 1065?
To the IRS, not the ATO. Paper filers use the address in the current Form 1065 instructions, based on principal business location and filing circumstances.
Can you e-file Form 1065 instead of mailing it?
Yes. Many partnerships may, and some must, e-file under current IRS rules. Confirm eligibility and keep the acceptance record from the IRS or your provider.
How do I find the correct Form 1065 mailing address?
Check the latest IRS "Where to File" page and Form 1065 instructions. Look for foreign-filer, payment, and delivery-method variations.
Do foreign partnerships file Form 1065?
Some do, particularly with effectively connected or U.S.-source income. Others qualify for exceptions based on U.S. activity, income, partners, and current IRS requirements.
What is the deadline for Form 1065?
Generally the 15th day of the third month after year-end, shifted for weekends and holidays. Verify the exact date and extension deadline for your tax year.
What should I do if I mailed Form 1065 to the wrong address?
Keep your mailing evidence and review the latest IRS instructions. Contact a qualified tax professional or the IRS before sending duplicate or amended submissions.
