The Manitoba Tuition Fee Income Tax Rebate is for people who have graduated. The Tuition Fee Income Tax Rebate Advance is for people who haven’t yet graduated. Basically, the Advance gives you a part of Rebate early.
So if you are eligible for the Advance Tuition Income Tax Rebate, then you can take it. http://www.gov.mb.ca/finance/personal/pcredits.html#advance