Some additional provincial credits may be available, as well, such as the Ontario Trillium Benefit, which can issue you monthly money based on your tax return.
If you attended school and have eligible tuition fees, you must file a tax return in order to claim the credits, even if you are not using them. You might not need to use the credits this year, but in order to carry forward or transfer them, they must be reported on your current year's tax return.
Please see the link below for additional information: