How to Mail Your Tax Return to the IRS

Mail your tax return to the address printed on the back of your tax form or listed on the IRS website for your state

The IRS accepts mailed tax returns at regional processing centers. Each state has its own mailing address, which appears on the back of Form 1040 and related schedules. You can also find the correct address on IRS.gov by searching "where to file" — the address depends on whether you live in a state that uses a single center or multiple centers, and whether you are including a payment.

Mailing takes longer than e-filing. A paper return typically arrives at the IRS within 7 to 10 business days, but processing can take 4 to 6 weeks or longer. If you are owed a refund, expect to wait 6 to 8 weeks from the date the IRS receives your return. If you owe taxes, the IRS counts the postmark date as your filing date, so mail your return by April 15 to avoid a late-filing penalty — even if it arrives after that date.

Key Takeaways

Use the mailing address printed on the back of your Form 1040 or find it on IRS.gov, because the address changes based on your state and whether you are sending a payment.
Mail your return in an envelope with your name and address on it, and use first-class mail or certified mail so you have proof of mailing.
The postmark date is your filing date, so mail by April 15 to meet the important date, even if the IRS does not receive it until later.
Processing a mailed return takes 4 to 6 weeks or longer, and refunds take 6 to 8 weeks from receipt, so plan ahead if you need the money by a certain date.
Include a payment coupon (Form 1040-ES) if you owe taxes, and send a check or money order — never send cash through the mail.

What to include in your mailed envelope

Your envelope should contain your completed tax form (Form 1040 and any schedules), all required supporting documents, and a copy for your records. Do not staple or clip pages together — the IRS prefers them loose or held with a rubber band. Write your Social Security number on every page of your return.

If you owe taxes, include a check or money order made payable to "United States Treasury." Write your Social Security number, daytime phone number, and tax year on the check. Do not send cash. Include Form 1040-ES (the payment coupon) if the IRS instructions for your form say to do so — this helps the IRS match your payment to your return. If you do not have the coupon, the payment will still be processed, but it may take longer to post to your account.

Do not send original documents unless the IRS specifically asks for them. Keep copies of everything you mail, along with your mailing receipt. If the IRS later asks for proof that you filed, you will need this documentation.

How to address your envelope and choose a mailing method

Write your name and address in the upper left corner of the envelope. Write the IRS mailing address in the center. Use a standard business envelope or a larger envelope if your return is thick. Make sure the address is clear and legible — smudged or hard-to-read addresses slow processing.

Use first-class mail or certified mail with return receipt requested. First-class mail is standard and costs the price of a stamp. Certified mail costs a few dollars more but gives you a receipt and tracking number, which proves the IRS received your return. If you are mailing a payment or expect the IRS to contact you, certified mail is worth the extra cost. Keep your receipt and tracking number until you receive confirmation that the IRS processed your return.

Mail your return early enough that it arrives by April 15 if you are filing by the important date. The postmark date is what counts, not the arrival date, but do not cut it close — mail delays happen, and you do not want to risk missing the important date. If April 15 falls on a weekend or holiday, the important date moves to the next business day.

Finding the correct mailing address for your state

The back of Form 1040 lists mailing addresses for each state. Look for your state name and follow the address listed next to it. Some states have multiple addresses depending on whether you are sending a payment or a refund-only return — read the instructions carefully to pick the right one.

You can also find the address on IRS.gov. Go to the "Where to File" page and select your state from the list. The page will show you the correct address and tell you whether to use a different address if you are sending a payment. Bookmark this page or print it so you have the address when you are ready to mail.

Do not mail to the IRS office in your city or county — those are walk-in offices and do not process mailed returns. Always use the regional processing center address for your state.

What happens after you mail your return

The IRS scans your return when it arrives at the processing center. This usually takes 1 to 2 weeks. You can check the status of your return using the IRS "Where's My Refund?" tool on IRS.gov, but the tool will not show your return until the IRS has scanned and entered it into their system.

If you are owed a refund, the IRS will deposit it into your bank account (if you provided account information on your return) or mail you a check. Direct deposit is faster — refunds usually arrive within 3 to 5 business days of approval. Paper checks take 7 to 10 business days. The total time from mailing to receiving your refund is typically 6 to 8 weeks, but can be longer if there are errors on your return or if the IRS needs more information.

If you owe taxes and mailed a check, the IRS will cash it once your return is processed. If your check is lost in the mail, the IRS will contact you. This is rare, but it is another reason to keep a copy of your mailed return and your mailing receipt.

Common mistakes to avoid when mailing your return

Do not forget to sign and date your return. An unsigned return is invalid and will be returned to you. If you are filing jointly, both spouses must sign. Do not use pen colors other than black or blue — the IRS scanning equipment reads these colors best.

Do not mail your return to a local IRS office or tax center. These offices do not process mailed returns, and your envelope will be forwarded, which delays processing. Always use the regional processing center address for your state.

Do not include extra documents unless the IRS asks for them. Receipts, invoices, and other supporting papers slow down scanning and can get separated from your return. Keep them at home in case the IRS requests them later. The only exception is if your tax form instructions specifically say to attach a document — for example, Form 8949 (sales of securities) must be attached to Schedule D.

Do not mail cash. Cash can be lost or stolen, and the IRS cannot trace it. Use a check or money order instead. Do not mail your return in a package with other items — send only your tax documents.

Frequently Asked Questions

What if I miss the April 15 important date?

The postmark date is your filing date. If your envelope is postmarked on or before April 15, you have filed on time, even if the IRS does not receive it until later. If you mail after April 15, you will owe a late-filing penalty unless you have a valid reason for the delay. File as soon as possible to minimize the penalty.

Can I mail my return if I owe taxes?

Yes. Include a check or money order with your return. The IRS will cash it once your return is processed. If you cannot pay the full amount, you can still mail your return and set up a payment plan later, but you will owe interest and penalties on the unpaid balance.

How do I know if the IRS received my mailed return?

Use certified mail with return receipt requested — the post office will give you a receipt showing the IRS signed for your envelope. You can also check the IRS "Where's My Refund?" tool after 1 to 2 weeks, though it will not show your return until it has been scanned into their system. Keep your mailing receipt until you see your return in the tool.

What if I need to mail my return after April 15?

Mail it as soon as possible. You will owe a late-filing penalty, but filing late is better than not filing at all. The penalty is 5 percent of the unpaid tax for each month your return is late, up to 25 percent. If you are owed a refund, there is no penalty for filing late, but you cannot claim a refund more than three years after the original important date.

Should I use certified mail or regular mail?

Certified mail costs more but gives you proof that the IRS received your return. If you are mailing a large payment or expect the IRS to contact you, certified mail is worth it. For a straightforward refund-only return, regular first-class mail is usually fine, but keep your receipt so you can prove you mailed it if needed.

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.