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