I'd like to share my experience about how I get my tax refund, hope it helps.
I was an international student, arrived Canada at Nov 2007.
I met my bf at beginning 2009 and we've been living together since June 2009.How I get the refund
I downloaded T1261 for applying ITN（individual Tax number) at April 2011, besides the form, I also provided my passport copy (the page with your picture) and my BCID copy. Please keep that in mind, CRA wants the original, certified, or notarized copies of your documents.
At the first time, I sent the copies without notarized since I was told by someone from CRA via the phone that it will be fine....
but later I got a letter with all my paper, which was asking me to provide certified paper. So I went to RCMP in Nanaimo, they notarized my paper for free. So I sent it back to CRA and I got my ITN at the end of May.
At the end of June 2011, my friend helped finishing all tax paper which included 2007-2010. I got tax refund at August 2011 that's regarding to 2008-9. However, they want me to provide my 2007 foreign income which I don't have in hand, so I haven't sent it. About my bf's part
My bf had to fill the RC65 for changing his marital status
from divorced to common-law partner.
We included our rental agreement which has our name on it and the landlord declared when I moved in, and common-law declaration (IMM5409) to prove we're common-law partner. CRA doesn't mention what kinda documents they want, so we
can just "guess" at that time.
We sent the RC65 at Apr 2011 and I put a note with the form that I was applying ITN so I couldn't provide my SIN now. Around a month later, we received a call from CRA, the gentle men said "he's processing the form now and he would like to leave his phone number to us and hope to hear from us later when I get my ITN." We called him back later when I had my ITN but he didn't answer so we left message. Although he never called back but my bf received his other tax refund later and his marital status has changed already.
That's my story....