Here's instructions on how to transfer Tuition from your child or grandchild. It's very important that the dependant prepare their tax return first and report the Tuition from the T2202A slip they received. Also, If any of the tuition credits are needed by them to reduce their own tax payable, the amount available for transfer will be reduced by the amount they use.

https://turbotax.community.intuit.ca/replies/2647703