I'm no longer a student but I have lots of unused tuition credits (over $100k unused for prov and fed each). I am still owing on my return. Does anyone know why?

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Upon inputting my unused tuition amounts from my previous year's Notice of Assessment there were some deductions. But it still shows that I am owing for my return. Does anyone know if there is a limit to how much unused tuition credits are applied for a tax year? Why does it not apply more of my unused tuition credits to my taxable income to reduce my tax owing to zero? Thanks!

[TurboTaxJennifer · Accepted solution]

Have a quick look at your Detailed Tax Summary paying extra attention to line 421 (CPP contributions due) near the bottom. If you're self-employed, you're responsible for paying your own CPP. Since tuition credits are non-refundable credits, they cannot offset CPP owing. The good news is, you'll still have lots of tuition credits left for future years.

*Tip - If you are self-employed, be sure to record all of your business-related expenses no matter how small. These expenses will lower both your tax owing and your CPP due.