I work and live in Ontario but worked for 3 months in Saskatchewan last year (same employer). I got a T4 from ON and a T4 from SK. 

My understanding is that I only file one tax return and and report both T4 slips indicating the respective province as per the T4. I will pay Federal and Ontario taxes in my T1 and there is no need to file and pay taxes separately for the Sask T4 income. Please confirm.