The Canada Revenue Agency (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.
How you file your adjustment depends on how your original tax return was filed, and whether it was a federal or Québec return. Instructions on filing adjustments for both scenarios are provided here:
For TurboTax Online:
Filing adjustments to a federal tax return
If you filed your original return using NETFILE:
1. Sign in to your TurboTax Online account for the tax year you want to prepare an adjustment for.
2. InReturn Manager, selectReFILEbeside the filed tax return you want to adjust.
If you printed and mailed your original return or are in a situation excluded from ReFILE:
See the CRA’sHow to change a returnpage to make an adjustment online in your CRA My Account or by mail.