I'm not an expert, but I think the only reason he might need this would be if you earned enough money that you actually had to pay tax in the States, and wanted to get a deduction for him as a dependent. I think you can file for yourself without much of his information.
For myself, I paid Turbo Tax to do my taxes for the first full year that I lived in Canada, kept a copy, and now just imitate what it did every year. If I ever earn enough to owe tax, I might have to change that.