That form should be the least of your concerns when you are moving (back) to Canada. Please, do your homework. There is a lot you must know before coming back.

Also, you will have to spend some time at a special customs desk upon arrival. They will stamp your lists of goods (to follow) - you may need those stamped lists when you want to bring your stuff in later on. AFAIK you have unlimited time to do so. I still have stuff in another country, and one day, I may bring it in. Since I put it on my list, I will avoid payment.

There are esspecially arkane rules for motor vehicles, alcohol and probably a myriad of other things. Please do yourself a favour and inform yourself.

If you have done your homework already and I've been preaching to the choir, and those questions about the forms are the only open questions remaining: Congratulations! I really mean that. It is not easy.

As for the forms, I'd go with emma69's advice.

(Also, chose the province of your first residence wisely. It may have implications for health insurance, for carryover of driving licenses, alcohol taxes, and probably various other things.)