The majority of deadlines listed here are for Tax Year 2024. Some apply to upcoming Tax Years and some are IRS or Federal deadlines.
May 15, 2025
Tax Year 2024
Income Tax Return
Prepare and e-File an IRS (Due Date April 15, 2025) and Louisiana State Income Tax Return (Due Date May 15, 2025) until
October 15, 2025. -
eFileIT
May 15, 2025
2024 Income Tax Extension
October 15, 2025
Tax Year 2024
Income Tax Return after the May 15, 2025 Louisiana Tax Extension
Last day to e-File a 2024 Louisiana State Income Tax Return for Tax Extension Filers and late eFilers. You can
only e-File (to file by paper see below) Louisiana Income Tax Return together with an IRS Tax Return.
eFileIT
November 15, 2024 via mail-in Forms.
Forms incl. Mailing Address are listed below.
Tax Year 2024
Income Tax Return after the May 15, 2025 Louisiana Tax Extension
Deadline for taxpayers who got a LA Tax Extension to file their Louisiana Income Tax Return by mail-in Forms - the Forms incl. mailing addresses are listed below - is November 15, 2024. (Optionally, the
eFileIT deadline is
Oct. 15, 2025). Instructions on how to
only - without the IRS return -
prepare and file a Louisiana State Income Tax Return on eFile.com.
Tax Amendment for all Tax Years
IRS Due Dates
IRS Tax Return, Extension, Amendment Deadlines
2024, 2025, etc.
Other State Tax Return, Extension, Amendment Deadlines
2024, 2025, etc.
IRS Federal Income Tax Return, Amendment, Extension Deadlines
May 15, 2028
2024 Louisiana Income Tax Return Refund.
IRS Tax Return Refund Claim DeadlineThe last day to file - you will not face late filing penalties - and claim your 2024 Louisiana Income Tax Return Refund. This deadline does not apply if you owe 2024 Income Taxes.