https://turbotax.community.intuit.ca/community/after-you-file/discussion/i-living-in-alberta-to-atte...

Thanks for your question. Under normal conditions, a person files a tax return for the province in which they are residing on December 31 of the taxation year.  Sometimes, a person may be considered to be a resident of a province even if they have temporarily relocated to another province.  This could happen if the person was employed in a temporary job, or was a student in a province where they do not normally reside.    A person will be determined to be resident in the province in which they have the most significant residential ties. If your usual province of residence is Saskatchewan, then you should file as a resident of Saskatchewan. For more information on this, see the Canada Revenue Agency (CRA) Income Tax Folio S5-F1-C1: Determining an Individual's Residence Status.