| Begin Transmitting live IRS e-file returns |
February 12, 2021 |
| Last date for transmitting timely filed returns |
May 17, 2021 |
| Last date for transmitting timely filed Forms 4868 |
May 17, 2021 |
| Last date for retransmitting rejected timely filed returns |
May 22, 2021 |
| Last date for retransmitting rejected timely filed Forms 4868 |
May 22, 2021 |
| 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, 2021 |
| Retransmitting rejected timely filed Forms 4868 or 2350 to meet overseas exception |
June 20, 2021 |
| Last date for transmitting returns on extension from Form 4868 |
October 15, 2021 |
| Last date for retransmitting rejected late or returns on extension from Form 4868 |
October 20, 2021 |
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