1. From 2009-2015, I was studying in universities, and earned no income. My parents paid all my tuition. We all live in ON. I filed my taxes, but didn't know about claiming tuition tax credits. I would've qualified for $750 (= $5000 x 15%), the maximum. [These comments counsel that I can amend my mom's and my tax returns in 2009-2015](https://redd.it/c2ttrc).
2. I can transfer them to only one person like my mom who earned only $40K yearly. ["If you are transferring an amount to a designated individual, only transfer the amount this person can use."](https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-return/completing-a-tax-return/deductions-credits-expenses/line-323-your-tuition-education-textbook-amounts/transferring-carrying-forward-amounts.html).
3. But how much of the $750 ought I transfer her?
4. Isn't it possible that transferring her the full $750 would waste these credits? u/bluenose777 [commented "yes" essentially](https://www.reddit.com/r/PersonalFinanceCanada/comments/c5khje/how_much_of_my_5kyr_tuition_tax_credit_ought_i/es35gnw/).

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> If for some reason (high deductions and credits) she only paid $700 in federal tax you would only want to transfer 700/15% = $4666.67.
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5. Here's my mom's 2009 return but edited for privacy.

[![enter image description here](https://i.stack.imgur.com/avEfW.jpg)](https://i.stack.imgur.com/avEfW.jpg)