[stanski]

I'm incorporated in Canada and have done my own corporate taxes in the past.

There is no hope to get this done right unless you use double entry accounting as every dollar has to be accounted for. Unlike personal taxes, where you only declare your income and pay a tax on that, every dollar that enters or leaves the company, or becomes a different kind of asset (say computer hardware) has to be declared and everything has to balance at the end of year.