Tax year 2025 / processing year 2026 Form 1040 MeF due dates

 
Transmission informationDate
Begin transmitting live IRS e-file returnsJanuary 26, 2026
Last date for transmitting timely filed returnsApril 15, 2026
Last date for transmitting timely filed Forms 4868April 15, 2026
Last date for retransmitting rejected timely filed returnsApril 20, 2026
Last date for retransmitting rejected timely filed Forms 4868April 20, 2026
Last date IRS will accept test transmissionsNo cut-off date
Last date to submit new IRS e-file applicationsNo cut-off date
Transmitting timely filed Forms 4868 or 2350 to meet overseas exceptionJune 15, 2026
Retransmitting rejected timely filed Forms 4868 or 2350 to meet overseas exceptionJune 20, 2026
Last date for transmitting returns on extension from Form 4868October 15, 2026
Last date for retransmitting rejected, late, or returns on extension from Form 4868October 20, 2026

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