If you already filed your return and then got additional forms in the mail, you'll 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