I was wise (afterthought) in having my returns prepared by a certified public accountant. Never a problem. Gnu, I have heard other horror stories about the 'revenuers'.

Digression on Canadian taxes- Once I found out that Canadian Tax Laws included 16 volumes of explanation, opinion and special cases (more now), none of that in the forms and explanation they send you, I have always had a certified accountant do the reporting for me.
The fee is deductable expense, even for individuals.
(certified is the wrong word in Canada, but it was the term for them that I was raised with- the right one will come to me as soon as I hit submit.)