The tuition transfer is non-refundable, so if neither you or your spouse/partner owe taxes, then transfering your child's tuition would be wasting it.
Here are some FAQs that you might find useful:
How much of my child’s or spouse’s unused tuition credits can be transferred to me?
How do I claim my tuition fees?
How do I transfer my unused tuition credits to someone else?
How do I enter tuition transferred from my spouse or child?
