Introduction
The right IRS address for your Form 1040 depends on three things: where you live, whether you're enclosing a payment, and which form you're sending. Mail it to the wrong place and you risk delays, or a payment that never gets credited.
Tax year versus filing year trips people up. The 2025 return covers 1 January to 31 December 2025 and is filed during 2026. The ordinary deadline is 15 April 2026. Taxpayers living abroad, including in Australia, may qualify for an automatic extension to 15 June 2026.
This guide covers U.S. state-based addresses, addresses for filers in Australia, payment prep, mailing proof, and e-filing. Confirm every address against the current IRS Form 1040 instructions before you seal the envelope.
Key Takeaways
- Check the official IRS "Where to File" page or the 2025 Form 1040 instructions right before mailing.
- Your residence and payment status set the address, not your preparer's location.
- Filers in Australia use the international addresses: Austin without payment, Charlotte with payment.
- Keep a full copy of your return and get proof of mailing.
Where to Mail Form 1040 Within the United States
Your mailing address depends on your state of residence and whether you enclose a check or money order. Form 1040 and Form 1040-SR use the same addresses.
State-Based Addresses When No Payment Is Enclosed
Use your state of residence. Not the state where you earned income, where your preparer sits, or where you drop the envelope.
| Group | State or district of residence | Address |
|---|---|---|
| A | Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Texas | Department of the Treasury, Internal Revenue Service, Austin, TX 73301-0002 |
| B | Connecticut, Delaware, District of Columbia, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Minnesota, Missouri, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, Wisconsin | Department of the Treasury, Internal Revenue Service, Kansas City, MO 64999-0002 |
| C | Alaska, California, Colorado, Hawaii, Idaho, Kansas, Michigan, Montana, Nebraska, Nevada, Ohio, Oregon, North Dakota, South Dakota, Utah, Washington, Wyoming | Department of the Treasury, Internal Revenue Service, Ogden, UT 84201-0002 |
| D | Arkansas, Arizona, New Mexico, Oklahoma | Department of the Treasury, Internal Revenue Service, Austin, TX 73301-0002 |
State-Based Addresses When a Payment Is Enclosed
| State group | Payment address |
|---|---|
| A | Internal Revenue Service, P.O. Box 1214, Charlotte, NC 28201-1214 |
| B, C and D | Internal Revenue Service, P.O. Box 931000, Louisville, KY 40293-1000 |
Groups A and D share Austin when no payment is enclosed, but they split once a payment is enclosed. That is why you cannot reuse the no-payment address.
Payment addresses are lockboxes. A bank separates documents from remittances and credits payments faster. Verify ZIP codes against the 2025 instructions.
Federal and State Returns Go to Different Places
Your federal Form 1040 and your state return go to different authorities. Don't put them in one envelope unless the instructions say so. California's Franchise Tax Board, for example, publishes its own paper-filing addresses.
Addresses also change. The 2025 instructions warn that "the address for returns filed after 2026 may be different." Don't trust last year's envelope.
Where to Mail Form 1040 From Abroad
If you live in Australia or any other foreign country, skip the state groups. Use the international addresses below, not a domestic centre such as Kansas City.
International Addresses
| Circumstance | Address |
|---|---|
| No payment | Department of the Treasury, Internal Revenue Service, Austin, TX 73301-0215, USA |
| Payment enclosed | Internal Revenue Service, P.O. Box 1303, Charlotte, NC 28201-1303, USA |
Special International Situations
These international addresses also cover:
- U.S. possessions and territories
- APO/FPO addresses
- Form 2555 or Form 4563 filers
- Dual-status returns
For American Samoa, Puerto Rico, Guam, the U.S. Virgin Islands and the Northern Mariana Islands, the IRS also points to Publication 570. The international addresses don't replace those territory rules, so check the instructions for any exception.
Your U.S. Return Is Separate From Your Australian One
U.S. citizens and resident aliens abroad generally remain subject to U.S. tax on worldwide income. Australia works separately. The ATO says Australian tax residents must declare foreign income, and its tax year runs 1 July to 30 June. Mailing Form 1040 to the IRS doesn't lodge anything with the ATO, and the two years don't line up.
When Professional Help May Be Useful
Cross-border income, foreign tax credits, or doubt about your filing status can complicate a return. VJM Global's U.S.-compliant tax professionals prepare Form 1040 and 1040-NR returns and offer a free tax consultation. That's preparation and advice, not a mailing service.
How to Prepare and Mail Form 1040 Correctly
Run through this before sealing the envelope:
- Sign the return. Both spouses sign a joint return.
- Enter Social Security numbers (or an existing ITIN where the form asks for an SSN).
- Attach Forms W-2 and 2439, plus W-2G and 1099-R when they show withholding.
- Put other schedules behind Form 1040 in attachment-sequence order.
- Keep a complete copy of everything you send.
Preparing a Payment
Make your check or money order payable to "United States Treasury." Write on it:
- Your name, address and daytime phone number
- Your SSN (the first-listed spouse's for joint returns)
- "2025 Form 1040" or "2025 Form 1040-SR"
Include Form 1040-V (2025) with the payment. Do not staple or attach the payment, voucher and return together. Note that the 2026 Form 1040-ES is not a voucher for your 2025 balance.
Addressing and Packaging the Envelope
Package the return carefully:
- Copy the IRS address exactly and apply enough postage
- Place the return and attachments in order
- Leave out state forms and unrelated documents
- Send payments by regular mail where the Form 1040-V instructions say so, since private carriers may delay payment processing
USPS and Private Delivery Services
Only certain private services count for timely-mailing purposes. The IRS designates these:
| Carrier | Designated services (partial) |
|---|---|
| DHL | Express 9:00, 10:30, 12:00; Express Worldwide; Express Envelope |
| FedEx | First, Priority and Standard Overnight; 2Day; International Priority, First, Economy |
| UPS | Next Day Air (all tiers); 2nd Day Air; Worldwide Express; Worldwide Express Plus |
Couriers can't deliver to a P.O. box. Use the street address:
- Austin: Internal Revenue Submission Processing Center, 3651 S IH35, Austin, TX 78741
- Kansas City: 333 W. Pershing, Kansas City, MO 64108
- Ogden: 1973 Rulon White Blvd., Ogden, UT 84201
Australian filers using the international route send courier shipments to Austin's street address. Check the IRS list for current service levels.
Proving Timely Mailing
Under IRC 7502, timely mailing can count as timely filing if the envelope is properly addressed, has enough postage and carries proof. Proof options include:
- Certified Mail
- Registered Mail
- A counter-issued Postage Validation Imprint
The IRS Taxpayer Advocate warns that USPS processing postmarks may differ from your deposit date under rules effective 24 December 2025. An official foreign postmark dated on or before the deadline is accepted.
Final Checklist
- Correct tax year and form
- Payment status matches the address
- Address verified on irs.gov
- Return signed
- Payment prepared, not stapled
- Postage paid
- Receipt and tracking retained
When the Standard Form 1040 Address Does Not Apply
Several forms have their own instructions, even if your residence and payment status don't change:
- Form 1040-X (amended return): has its own Where To File table. Foreign filers use Austin, TX 73301-0215.
- Form 4868 (extension): has its own domestic chart. Foreign filers use Austin without payment, or P.O. Box 1303, Charlotte with payment. An electronic payment marked as an extension can replace the paper form.
- Form 1040-ES (estimated tax): covers 2026 estimated tax, with its own chart.
- Form W-7: goes with your return to the ITIN Operation in Austin, using a separate address.
- Form 8822: don't attach it to your return.
- FBAR: file electronically through FinCEN's BSA E-Filing system, not with Form 1040.
Match each document (state return, federal return, amendment, voucher) to its own official instructions.
What to Do After Mailing or Instead of Mailing
E-Filing vs. Paper
More than 98% of over 78 million individual returns received this season were electronic, according to an IRS release. E-filing gives you acceptance confirmation and faster refunds: typically about three weeks, compared with six or more weeks from receipt for paper.
Overseas filers can use Free File, but few participating companies accept foreign addresses. Direct deposit only works with U.S.-located financial institutions. Some situations still need paper, such as a W-7 ITIN application filed with the return.
Tracking a Paper Return
- Use tracked international mail or a courier with delivery confirmation.
- Check Where's My Refund? about four weeks after paper filing.
- Use your IRS Online Account for transcripts and payment history.
- Track amended returns through Where's My Amended Return? (usually 8 to 12 weeks).
Refund timing starts at IRS receipt, so don't count international transit as processing time. Allow extra transit time from Australia.
If Something Goes Wrong
If the return went to the wrong address, came back, or got separated from its payment:
- Keep your proof of timely mailing.
- Call the IRS refund line at 800-829-1954, or ask a qualified tax professional.
- Don't assume sending a duplicate is the right fix without checking.
Also check your filing and payment deadlines separately. Even with the June extension, interest runs from the ordinary payment deadline.
Frequently Asked Questions
What is the IRS mailing address for tax returns?
It varies by state, payment status, and whether you file from abroad. Use the IRS "Where to File" page for Form 1040 for the current address.
Can I amend my tax return?
Yes, generally with Form 1040-X. It has its own mailing addresses. A refund claim is generally due within three years of filing or two years of payment, whichever is later.
How do expats file taxes in the USA?
U.S. citizens and resident aliens abroad generally file Form 1040 on worldwide income. They mail to the international address or e-file, and may add forms like 2555 for foreign earned income.
What is adjusted gross income (AGI)?
AGI is gross income minus eligible adjustments. On the 2025 Form 1040 it's calculated on line 11a and carried to line 11b.
What should I enter on line 16 of Form 1040?
Line 16 is "Tax." Use the Tax Table below $100,000 of taxable income, or the Tax Computation Worksheet at $100,000 or more, subject to exceptions in the 2025 instructions.
What is Schedule 1?
It reports additional income and adjustments to income. Additional income flows to line 8 and adjustments to line 10. Attach it only when the 2025 instructions require it.
