Ma wife got very same issue & letter and we are planing the same response & its good to know that only cover letter works.... Thanks for sharing man!
wes786 said:I got the same thing last year, they asked me to provide a cover letter explaining the situation how the immigration is still under process and she is currently not a canadian resident but my dependent. I asked them if they needed a copy of my Nikah nama, but they said it wasn't needed. SO I just sent the cover letter explaining everything and this year I got my tax refund and they didn't ask for anything else...