You only fill in one box.

If you got a T2202 slip, on there it will tell you if you have part time attendance or full time attendance. If you have the T2202 slip then claim the amount in either the box for part time or full time attendance (depending on box B or C of the T2202).

If you do not receive a T2202 slip then you will claim the amount in the other awards box or the elementary/secondary school award, which ever applies.