How do I file taxes when I worked in two different states?

How do I file my taxes if I worked in two different provinces in 2007?

• I worked at a couple different places in Ontario between January, and September 2007, and worked at one place in Manitoba between October and December 2007. I was residing in Manitoba on December 31, 2007, but have no documents that say so(I haven't switched over my health card or anything yet). Also, I worked for the same company in Ontario, and in Manitoba (Loblaws.. ON- Wholesale, and MB- Superstore. I was wondering if the income from both these places will be on the same T4 since it is the same company, or seperate since they are two different places in two different provinces? What do I do if they are included on the same T4, if I must file my taxes for both different provinces? Thanks so much.

• Answer:

  You file in your province or residence on Dec 31. You don't have to 'prove' it, it's just what you tell them. Don't lie of course, that can have massive consequences, but there is no need to document it. That makes the question about the T-4 irrelevant, but I wonder why you don't know that, because you should have received them by Feb 29 or very soon after. You might want to contact them and make sure they have you new address.