The majority of deadlines listed here are for Tax Year 2023. Some apply to upcoming Tax Years and some are IRS or Federal deadlines.
April 15, 2024
Tax Year 2023
Income Tax Return
Prepare and eFile an IRS (Due Date April 15, 2024) and Kansas State Income Tax Return (Due Date April 15, 2024) until October 15, 2024. -
eFileIT
April 15, 2024
2023 Income Tax Extension
October 15, 2024
Tax Year 2023
Income Tax Return after the April 15, 2024 Kansas Tax Extension
Last day to eFile a 2023 Kansas State Income Tax Return for Tax Extension Filers and late eFilers. You can
only eFile (to file by paper see below) Kansas Income Tax Return together with an IRS Tax Return.
eFileIT
October 15, 2024
via mail-in Forms. Forms incl. Mailing Address are listed below.
Tax Year 2023
Income Tax Return after the April 15, 2024 Kansas Tax Extension
Deadline for taxpayers who got an KS Tax Extension to file their Kansas Income Tax Return by mail-in Forms - the Forms incl. mailing addresses are listed below - is Oct. 15, 2024. (Optionally, the
eFileIT deadline is Oct. 15, 2024). Instructions on how to
only - without the IRS return -
prepare and file a Kansas State Income Tax Return on eFile.com.
Tax Amendment for all Tax Years
2023, 2024, etc.
Other State Tax Returns Extensions Amendment Deadlines
2023, 2024, etc.
IRS Federal Income Tax Returns, Amendment, Extension Deadlines
April 15, 2027
2023 Kansas Income Tax Return Refund
The last day to file and claim your 2023 Kansas Income Tax Return. This deadline does not apply if you owe 2023 Income Taxes.