Regular resident, Deemed resident or Non-resident tax return package?
If you don't have a significant residential ties with Canada, you may be considered Deemed Resident, or Non-resident of Canada.
If you think you are a deem-resident of Canada, read this
https://www.canada.ca/en/revenue-agency/services/tax/international-non-residents/individuals-leaving-entering-canada-non-residents/deemed-residents.html
Or you are a non-resident of Canada
https://www.canada.ca/en/revenue-agency/services/tax/international-non-residents/individuals-leaving-entering-canada-non-residents/non-residents-canada.html