Is it easy to make a change to my return after submitted? For example, if I submit a return tonight and make a change tomorrow, would it auto-adjust?

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.

For more information, please read this TurboTax FAQ - I've filed my tax return. Can I still make changes? 

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