Income tax works differently and depends on residency rather than property ownership. The Canada Revenue Agency determines your provincial income tax based on where you were resident on December 31 of that tax year, which can differ from where any property you still own is located.
If you are selling from a distance, a lawyer regulated by the Law Society of Saskatchewan can close on your behalf under a power of attorney, so an out-of-province move does not require you to be physically present for the closing itself.
Sorting out what you actually owe, on the property and on your move, is easier once you know what the home will sell for and when. Get your hand-reviewed valuation from Joel Dyck.