
Provincial restrictions have eased as of Tuesday and measures at all border crossings have changed slightly. As of March 1st pre-entry testing has changed. A negative PCR test is no longer required however a negative antigen test, observed at a laboratory or testing provider in the U.S., is now required to return to Canada no more than one day before arrival. Failing to provide a negative test at the border could result in fines or even criminal prosecution. Travelers returning to Canada are still required to fill out the ArriveCAN App before returning. Canada Border Services encourage everyone to check if you are eligible to cross the border before traveling.
https://travel.gc.ca/travel-covid/travel-restrictions/covid-vaccinated-travellers-entering-canada