Since you have income from renting out your house in Canada, according to Canadian tax law, even as a non-tax resident of Canada, you are still obliged to report and pay taxes to the Canadian government for your income in Canada. If you fail to fulfill your obligations on time, there will be penalties and interest. If you plan to sell your house in the future, this work is particularly important, because if you fail to report income and pay taxes on time, you will not be able to get the full house price when you sell the house. The lawyer who takes over the house will withhold part of the house price on behalf of the tax bureau because the tax relationship of your house sale has not been clarified.