The majority of deadlines listed here are for Tax Year 2022. Some apply to upcoming Tax Years and some are IRS or Federal deadlines.
April 18, 2023
Tax Year 2022
Income Tax Return
Prepare and e-File an IRS (Due Date April 18, 2023) a Missouri State Income Tax Return (Due Date April 18, 2023) until October 16, 2023. -
eFileIT
April 18, 2023
2022 Income Tax Extension
October 16, 2023
Tax Year 2022
Income Tax Return after the April 18, 2023 Missouri Tax Extension
Last day to e-File a 2022 Missouri State Income Tax Return for Tax Extension Filers and late eFilers. You can
only e-File (to file by paper see below) Missouri Income Tax Return together with an IRS Tax Return.
eFileIT
October 16, 2023 via mail-in Forms.
Forms incl. Mailing Address are listed below.
Tax Year 2022
Income Tax Return after the April 18, 2023 Missouri Tax Extension
Deadline for taxpayers who got a MO Tax Extension to file their MO Income Tax Return by mail-in Forms - the Forms incl. mailing addresses are listed below - is October 16, 2023. (Optionally, the
eFileIT deadline is Oct. 16, 2023). Instructions on how to
only - without the IRS return -
prepare and file a Missouri State Income Tax Return on eFile.com.
Tax Amendment for all Tax Years
IRS Due Dates
IRS Tax Return, Extension, Amendment Deadlines
2022, 2023, etc.
Other State Tax Return, Extension, Amendment Deadlines
2022, 2023, etc.
IRS Federal Income Tax Return, Amendment, Extension Deadlines
April 15, 2026
2022 Missouri Income Tax Return Refund.
IRS Tax Return Refund Claim DeadlineThe last day to file - you will not face late filing penalties - and claim your 2022 Missouri Income Tax Return Refund. This deadline does not apply if you owe 2022 Income Taxes.