I just did mine on the Government of Canada site. Got my refund in about 2 weeks. There's also a telephone number you can do it on.
You can also use older versions of stuff like Turbo tax if you wanna save money. At one point I used the same version for 3 years in a row... as long as there's been no major changes in tax laws, it's the same thing every year.
You can also go on Usenet and grab a freebie version if you feel like being a piracy skunk.