Solved
Goal is to transfer past tax data to his 2021 filing. Thank you.
Unfortunately, data cannot be transferred from one account to another. Your son will need to start his new account from scratch. But, if he has a CRA My-Account he will be able to auto-fill his information and slips from the CRA.
For more information on Auto-Fill, please see our TurboTax article:
The Complete Guide to Auto-Fill my Return (AFR) | 2022 TurboTax® Canada Tips (intuit.ca)
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