I bet there's similar information for Ontario - things can vary quite a bit by province.
How long do you have to return the paperwork? If you have a little time, you could trying writing down everything you spend (I know, how tedious!). There are usually things we don't think of when trying to capture our expenses. Or stick in a miscellaneous category, if that's possible.
You're finding something positive even in this difficult circumstance (your increasing knowledge) - good for you!