Where Do I Mail My Missouri State Tax Return?

Filing your Missouri state income tax return by mail requires using the correct mailing address. Ensuring your return reaches the proper destination helps avoid processing delays and ensures timely compliance with state tax regulations.

Identifying the Correct Mailing Address

The Missouri Department of Revenue uses different mailing addresses depending on whether you owe taxes, are due a refund, or are submitting an amended return.

If you are mailing your Missouri income tax return (Form MO-1040) and do not owe any tax or are due a refund, your return should be sent to:
Missouri Department of Revenue
P.O. Box 500
Jefferson City, MO 65105-0500

If you are mailing your Missouri income tax return and are enclosing a payment, your return and payment should be sent to:
Missouri Department of Revenue
P.O. Box 329
Jefferson City, MO 65105-0329

For amended Missouri individual income tax returns, the mailing addresses are generally the same as for original returns based on whether a refund is due or payment is enclosed. If you are due a refund on an amended return, mail it to P.O. Box 500, Jefferson City, MO 65105-0500. If you have an amount due with an amended return, mail it to P.O. Box 329, Jefferson City, MO 65105-0329.

Preparing Your Mail Package

Assembling your tax return package properly is the next step. Your submission should include your completed Missouri Individual Income Tax Return (Form MO-1040) along with any supporting schedules. It is also necessary to attach copies of all Forms W-2 and 1099s that report Missouri tax withheld.

If you are making a payment, include a check or money order made payable to the “Missouri Department of Revenue.” Write your name, address, Social Security Number, daytime telephone number, and the tax year (e.g., “2024 MO Income Tax”) on your check or money order. Also include the Individual Income Tax Payment Voucher (Form MO-1040V) with your payment, especially if you are mailing a payment for an electronically filed return or a partial payment. Securely paperclip all documents together, avoiding staples, and ensure sufficient postage is affixed to the envelope. Clearly write your return address on the envelope.

Important Mailing Considerations

Meeting the filing deadline is important when mailing your state tax return. The typical deadline for filing Missouri individual income tax returns is April 15th, or the next business day if April 15th falls on a weekend or holiday. Your return is considered filed on time if it is correctly addressed, has sufficient postage, and is postmarked by the due date.

To ensure proof of mailing and delivery, consider using services like Certified Mail with a return receipt through the U.S. Postal Service. This provides a record that you mailed your return on a specific date and confirmation of its delivery. While the Missouri Department of Revenue does not typically provide direct confirmation of receipt for mailed returns, you can often check the status of your return online using your Social Security Number, filing status, and the exact refund or balance due amount.