Hello,
That's a tough question, but the following guide may be of benefit to you:
http://www.cra-arc.gc.ca/E/pub/tg/t4055/t4055-e.html#P195_15107
Also, try calling the CRA at 1-800-959-8281, some reps are really knowledgeable and they'll point you in the right direction.
Madan Chartered Accountant team
www.madanca.com