If you were in school full time for a period of at least 13 weeks, then you are not eligible for the Working Income Tax Benefit, which is a benefit for tax payers with low income, but income from employment or self employment.  The software will know if you are entitled once you enter the details from your T2202.

http://www.cra-arc.gc.ca/bnfts/wtb/fq_qlfyng-eng.html#q2