This service is not available 24 hours a day due to daily maintenance activities. Tax returns and SEND requests may be filed over the Internet during the following hours.
|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.|