Where to Mail Your 1040 Tax Return

The IRS mailing address depends on your state and whether you're including a payment

The IRS publishes different mailing addresses for different states, and the address you use matters — mail sent to the wrong location can delay processing or get lost. The address also changes depending on whether you're sending a check or just your return. The IRS website lists the correct address for your state on the back of the 1040 instruction booklet, and you can also find it on IRS.gov by searching "where to file" along with your state name.

If you're mailing from within the United States, use the address listed for your state. If you're mailing from outside the U.S., there's a separate address for international filers. The key is matching your state to the right processing center — the IRS operates multiple regional centers, and sending your return to the wrong one adds weeks to processing time.

Key Takeaways

The correct mailing address for your 1040 depends on your state and whether you're including a payment with your return.
The IRS publishes state-specific addresses in the 1040 instruction booklet and on IRS.gov under "where to file".
Mailing your return to the wrong address delays processing and can cause your return to be returned to you.
If you're mailing from outside the United States, use the international filer address, not your state's domestic address.
The IRS processes paper returns more slowly than e-filed returns — expect 4 to 6 weeks for processing if you mail your return.

How to find your state's mailing address

The 1040 instruction booklet includes a table with mailing addresses for all 50 states, organized alphabetically. This booklet comes with the 1040 form itself if you order it by mail, or you can read it as a PDF from IRS.gov. The table shows two addresses for most states: one for returns without a payment and one for returns with a check or money order enclosed.

If you don't have the booklet, go to IRS.gov and use the search box to look for "where to file" plus your state name — for example, "where to file California" or "where to file Texas". The IRS website will show you the correct address for your situation. You can also call the IRS at 1-800-829-1040 and ask for the mailing address for your state, though wait times are often long during tax season.

Addresses for returns with and without payments

Most states have two different mailing addresses: one for returns sent without a payment, and one for returns sent with a check or money order. This separation helps the IRS route payments to the correct processing center. If you're sending a refund return (meaning the IRS owes you money), use the address for returns without a payment. If you're sending a payment, use the address labeled for returns with payment.

Using the wrong address for a payment can delay the posting of your payment to your account, which may result in interest and penalties if the IRS doesn't receive it by the tax important date. The difference between the two addresses is usually just the street or building number, so check the instruction booklet carefully before you seal the envelope.

Mailing from outside the United States

If you're mailing your 1040 from a country outside the United States, do not use your state's domestic mailing address. The IRS publishes a separate address for international filers in the 1040 instruction booklet, usually listed at the end of the "where to file" section. This address routes your return through customs and international mail processing before it reaches the IRS.

International mail is slower than domestic mail — expect 6 to 8 weeks for your return to arrive at the IRS, plus another 4 to 6 weeks for processing. If you're concerned about timing, consider e-filing instead, which is faster and doesn't depend on international postal service. The IRS accepts e-filed returns from filers outside the U.S. as long as you have a valid Social Security number or Individual Taxpayer Identification Number (ITIN).

What to include in your envelope

When you mail your 1040, include the form itself, any schedules or attachments the form requires (such as Schedule C if you're self-employed), and a check or money order if you owe taxes. Do not include cash — the IRS will not process it, and it can be lost in the mail. Write your Social Security number and "1040" on the front of your check so the IRS can match the payment to your return.

Include a cover letter if you're sending documents the IRS requested, such as receipts or proof of income. A straightforward letter explaining what's enclosed helps the IRS route your documents to the right department. Do not send original documents unless the IRS specifically asks for them — send copies instead, because the IRS does not return documents sent with your return.

Processing time for mailed returns

The IRS processes paper returns more slowly than e-filed returns. A mailed 1040 typically takes 4 to 6 weeks to process after it arrives at the IRS, but the mail itself can add another 1 to 2 weeks depending on where you're mailing from. If you're expecting a refund, the IRS will mail you a check after processing is complete, which adds another 1 to 2 weeks. Total time from mailing to receiving a refund check is often 8 to 10 weeks or longer.

If you need your refund faster, e-filing with direct deposit is the quickest option — the IRS can deposit a refund into your bank account in as little as 21 days. You can track the status of a mailed return using the IRS's "Where's My Refund?" tool on IRS.gov, though the tool only updates once a week for paper returns.

Common mistakes when mailing your return

The most common mistake is using an outdated address — the IRS changes mailing addresses occasionally, so always check the current year's instruction booklet or IRS.gov before you mail. Another mistake is using the wrong address for your situation (payment vs. no payment), which can delay processing by several weeks. A third mistake is not signing and dating the form — an unsigned 1040 is invalid and will be returned to you.

Forgetting to include required schedules or attachments is also common. If you claim the Earned Income Tax Credit (EITC), for example, you must include Schedule EIC with your return. If you're self-employed, you must include Schedule C. The instruction booklet lists all required schedules for your situation — check it before you seal the envelope. Finally, do not mail your return to a local IRS office or tax office — these offices do not process returns. Always use the mailing address published in the instruction booklet.

Frequently Asked Questions

Can I mail my 1040 to my local IRS office instead of the address in the booklet?

No. Local IRS offices do not process tax returns. Mail sent to a local office will be forwarded to the correct processing center, which delays processing by several weeks. Always use the mailing address listed in the 1040 instruction booklet for your state.

What if I mail my return but realize I made a mistake after I've sent it?

If you catch the mistake before the IRS processes your return, you can mail an amended return using Form 1040-X. If the IRS has already processed your return, you can still file an amended return, but it will take additional time. The sooner you file the amendment, the better — do not wait.

Do I need to use certified mail or delivery confirmation when I mail my 1040?

It's not required, but it's a good idea if you're sending a payment or if you want proof that your return was delivered. Certified mail with return receipt costs a few dollars extra and gives you a tracking number and a signed receipt from the post office. Keep this receipt in case the IRS says it never received your return.

What if the address in my instruction booklet looks wrong or outdated?

Check IRS.gov first — the website is updated more frequently than printed booklets. Search for "where to file" plus your state name. If the website address differs from your booklet, use the website address. You can also call the IRS at 1-800-829-1040 to confirm the current address for your state.

Can I mail my 1040 to a tax preparation company or tax software company instead of the IRS?

No. Tax preparation companies and tax software companies do not process returns — they only prepare them. You must mail your completed 1040 directly to the IRS using the address in the instruction booklet. If a company offers to mail your return for you, they will still send it to the IRS address, not to their own office.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.