Yes, you can still make changes using REFILE.

Instructions on by TurboTax FAQ : I've filed my tax return. Can I still make changes? 

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@Jen210 Thank you for your response. I understand that I can use ReFILE to make changes. However, I am unable to find where to enter the foreign income before moving to Canada. Can you please guide me on where to find and enter this specific information in ReFILE?

@zhannazaia 

Please complete RC151- and in section 6 it will ask for your past 2 years' income before becoming Canadian residents. You will need to enter the amounts in CAN currency.

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