Unfortunately, you cannot transfer your data from a return submitted last year via TurboTax Online to the CD/Download version this year, as the CD version uses files with the .tt22 extension. Data for returns submitted online are saved in a cloud database that does not have the same extension.
However, by logging into your My CRA Account and/or My Revenu Québec Account, you will be able to retrieve a copy of last year's return, which you can then use to manually fill in the information required for your current year's return.
However, it is possible to transfer data from the downloaded software to the online software.
Here are the steps: How do I transfer last year's tax information to TurboTax Online from TurboTax CD/Download?
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