According to the TurboTax article: "The amounts of unused credit are applied to reduce tax payable automatically. The Canada Revenue Agency (CRA) applies the available tuition amount carried forward every year to reduce your taxes to zero until it has all been used."
To see if you have any unused tuition amount left, you can verify your information on the Canada Revenue Agency My Account for Individuals.
For more information, this TurboTax article below from our website will be useful.
Using Carry Forward Amounts
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