Hi suvigb, I have the same question ! What a coincidence 🙂
In 2018, I had a summer job (intership) at 600km of my original house, so I moved to the other city for the summer and came back for my fall session. Now, I try to deduct my expenses that I already pay back then (2018) in my 2019 tax submission because I didn't know we could deduct moving expenses back then… So, is it possible or too late ?