EFILE transmission service – Hours of operation
The T1 EFILE and ReFILE services are open for transmission from February 20, 2023 at 8:30 a.m. (Eastern time), until January 26, 2024. You can electronically file your clients 2017, 2018, 2019, 2020, 2021, and 2022 initial personal income tax and benefit returns using the EFILE service and you can file your clients amended T1 returns for 2019, 2020, 2021, and 2022 using ReFILE.
The T3 EFILE service is open for transmission from February 20, 2023, at 8:30 a.m. (Eastern Time), until January 19, 2024. You can electronically file your clients’ 2021, 2022 and 2023 initial T3 trusts returns such as T3RET, T3ATH-IND, T3M, T3S and T3-RCA using T3 EFILE.
The services are available 21 hours a day. Due to daily maintenance activities, the services are not available for three hours a day from 3 am to 6 am (Eastern time)
| Time zone | Monday to Sunday |
|---|---|
| Pacific time | 3:00 a.m. to midnight |
| Mountain time | 4:00 a.m. to 1:00 a.m. |
| Central time | 5:00 a.m. to 2:00 a.m. |
| Eastern time | 6:00 a.m. to 3:00 a.m. |
| Atlantic time | 7:00 a.m. to 4:00 a.m. |
| Newfoundland time | 7:30 a.m. to 4:30 a.m. |
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