| Transmission information | Date |
|---|---|
| Begin transmitting live IRS e-file returns | January 23, 2023 |
| Last date for transmitting timely filed returns | April 18, 2023 |
| Last date for transmitting timely filed Forms 4868 | April 18, 2023 |
| Last date for retransmitting rejected timely filed returns | April 23, 2023 |
| Last date for retransmitting rejected timely filed Forms 4868 | April 23, 2023 |
| Last date IRS will accept test transmissions | No cut-off date |
| Last date to submit new IRS e-file Applications | No cut-off date |
| Transmitting timely filed Forms 4868 or 2350 to meet overseas exception | June 15, 2023 |
| Retransmitting rejected timely filed Forms 4868 or 2350 to meet overseas exception | June 20, 2023 |
| Last date for transmitting returns on extension from Form 4868 | October 16, 2023 |
| Last date for retransmitting rejected late or returns on extension from Form 4868 | October 21, 2023 |
