You will need to amend your 2010 return. You can't apply a receipt from 2010 on your 2015 return.
Amend a Tax Return
You already filed your tax return, it was accepted by the CRA,
and now you received additional forms or tax information or you need to
correct something.
If so, you need to amend the tax return
you already filed. First, be sure the return was accepted by the CRA,
and do not change the return you already filed. Amended returns must be
filed on a new form called T1-ADJ, T1 Adjustment Request.
Follow these steps:
- Check that the CRA received your return
- Follow these instructions to amend your return
For more information, kindly follow this link:
https://turbotax.community.intuit.ca/questions/1190138-how-do-i-amend-my-tax-return
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