You can make changes to a filed tax return by filing an adjustment. The CRA requires that you wait until you’ve received your Notice of Assessment (NOA) before filing an adjustment. In many cases, the CRA will catch the mismatch and automatically adjust your return for you.
If you filed your original return using NETFILE:
Sign in to your TurboTax Online account for the tax year you want to prepare an adjustment for
InReturn Manager, selectReFILEbeside the filed tax return you want to adjust
Please see the links below for additional assistance: