Due Date

The due date for filing 2017 Mississippi Individual Income Tax Returns is Tuesday, April 17, 2018.

Anyone that requests an extension of time to file has until October 15, 2018 to file the return. Please note that the extension of time is for filing the return, not paying the tax. Any tax due should be paid on or before April 17, 2018 in order to avoid penalty and interest.

Mississippi will begin accepting electronically filed returns on January 29, 2018. We encourage everyone who is able to file electronically​. If you file by paper, the most common return forms are available in your public library.​​​​