Mail your 1040 to the IRS service center that covers your state

The IRS does not have one central address for all tax returns. Instead, you mail your 1040 to a regional service center based on where you live. The address you use depends on your state and whether you are enclosing a payment.

The IRS publishes the correct mailing address for your state in the 1040 instructions each year. You can also find it on the IRS website under "Where to File" or by calling the IRS at 800-829-1040. Using the wrong address delays processing and can trigger notices about missing returns.

If you file electronically instead of mailing a paper return, you bypass this step entirely — the software or tax professional you use submits the return directly to the IRS.

Key Takeaways

  • The correct mailing address depends on your state and is listed in the 1040 instructions or on IRS.gov under "Where to File".
  • If you are enclosing a check, use the address for returns with payment; if you are not, use the address for returns without payment — they are different.
  • Mail your return early enough that it arrives by April 15 (or the next business day if April 15 falls on a weekend or holiday).
  • Electronic filing avoids the mailing address question and typically results in faster processing and refunds.

Different addresses for returns with and without payment

The IRS maintains two separate mailing addresses for most states: one for returns with a payment enclosed and one for returns without. This separation helps the IRS route mail to the correct processing center. If you mail your return to the wrong address, it will eventually reach the right place, but processing takes longer.

Before you seal the envelope, check whether you are enclosing a check or money order. If you owe taxes and are paying by mail, use the "with payment" address. If you expect a refund or owe nothing, use the "without payment" address.

The 1040 instructions booklet lists both addresses for your state on the back cover or in the section titled "Where to File". The IRS website also displays both addresses if you enter your state.

How to find the correct address for your state

Open the 1040 instructions PDF on IRS.gov or the paper booklet you received. Look for the section called "Where to File" — this is usually near the back. Find your state in the list and note both the address for returns with payment and the address for returns without payment.

If you do not have the instructions, visit IRS.gov and search for "Where to File". The IRS maintains a searchable tool where you enter your state and filing status, and it displays the correct address. You can also call the IRS at 800-829-1040 and ask for the address.

Write the address on your envelope exactly as shown. The IRS uses optical scanning equipment to read addresses, so accuracy matters. Do not abbreviate street names or use non-standard formatting.

Timing and delivery methods

Your 1040 must be postmarked by April 15 (or the next business day if that date falls on a weekend or holiday) to be considered on time. The postmark date is what counts, not the date the IRS receives it. Mail your return at least one week before the important date to account for postal delays.

You can mail your return using regular first-class mail, certified mail, or any postal service that provides a postmark. If you use certified mail, keep the receipt as proof of mailing. The IRS does not require certified mail, but it gives you documentation if questions arise later.

Do not use a private carrier like FedEx or UPS unless it provides a postmark. The IRS only recognizes the U.S. Postal Service postmark as proof of timely filing.

What to include in the envelope

Include your completed 1040 form, all required schedules (such as Schedule C if you are self-employed, or Schedule A if you itemize deductions), and any supporting documents the IRS requests. Do not send original documents like W-2s or receipts unless the IRS specifically asks for them.

If you are enclosing a payment, include a check or money order made payable to "United States Treasury". Write your Social Security number, the tax year, and "1040" on the check. Do not send cash.

Attach all pages together with a staple or paperclip in the top left corner. Do not use tape or glue. The IRS processes thousands of returns daily, and loose pages can separate and be lost.

Why electronic filing is faster

Filing electronically means the IRS receives your return the same day you submit it, not days or weeks later. E-filed returns are also processed faster, and refunds are issued sooner — typically within 21 days instead of four to six weeks for paper returns.

You can file electronically through tax software (such as the IRS Free File program if your income is below the threshold), a tax professional, or a tax preparation service. The software or professional submits your return directly to the IRS, and you receive a confirmation number showing it was received.

Electronic filing also reduces errors because the software checks your math and flags missing information before submission. If you make a mistake on a paper return, the IRS sends a notice, and you have to respond. With e-filing, you catch most errors before they reach the IRS.

What happens after you mail your return

After the IRS receives your return, it typically takes four to six weeks to process a paper return and issue a refund. You can track the status of your return using the IRS "Where's My Refund?" tool on IRS.gov or by calling 800-829-1040. You will need your Social Security number, filing status, and the refund amount.

If the IRS finds an error or needs more information, it will send you a notice by mail. Do not ignore these notices. Respond within the timeframe shown on the notice, or the IRS may assess additional tax or penalties.

If you filed electronically, you can check your refund status within 24 hours of submission. Paper returns take longer to enter the system, so do not expect when ready tracking information.

Frequently Asked Questions

What if I mail my return to the wrong address?

The postal service or IRS will eventually forward it to the correct location, but processing will be delayed by several weeks. To avoid this, double-check the address in the 1040 instructions before sealing the envelope. If you realize you mailed it to the wrong address, call the IRS at 800-829-1040 to report it.

Can I email my 1040 to the IRS?

No. The IRS does not accept tax returns by email. You must mail a paper return or file electronically through approved software or a tax professional. Email is not a find method for transmitting sensitive financial information.

Do I need to use certified mail?

Certified mail is optional but recommended if you want proof of delivery. Regular first-class mail is sufficient as long as it is postmarked by the important date. Keep the receipt if you use certified mail, in case you need to prove you filed on time.

What if April 15 falls on a weekend?

The important date moves to the next business day, usually Monday. In some years, a state holiday falls on Monday, pushing the important date to Tuesday. The IRS announces the exact important date each year. Check IRS.gov in early April to confirm the important date for that year.

How long does it take the IRS to receive a mailed return?

Typically three to seven business days, depending on where you mail from and the location of the service center. Mail your return at least one week before April 15 to may support it arrives by the important date. If you are mailing close to the important date, consider filing electronically instead.