Try connecting these guys as they have quite a bit of experience with this. once you sort out your first-year taxes and then you file your own in the future.
https://www.kimtiaccounting.ca/
There should a tab called tax information slips and if you click on this and expand the year 2020, it will give you all the slips available for the year 2020.
You should still file your taxes in Canada even you don't have any income as long as you are on a work permit, student visa or PR. This tax filing will provide some Govt benefits.