To Claim Your Graduate Tax Credit

You no longer need to apply for a Graduate Tax Credit Certificate.

Just claim the credit on your 2007 or later tax return.

You need to attach your diploma to your 2007 (or later) tax return (paper version). If you are filing electronically, keep all of your documents in case the Canada Revenue Agency asks to see them.
You can claim this credit only once, even if you graduate from more than one post-secondary eligible program.
Claim this credit in the year you graduate; any unused amount may be claimed in the following two years.