If you are already signed into the TurboTax online software, scroll down and select "Start a new 2021 return."
If you are not already signed into TurboTax, you can select a package and start a new TurboTax return for 2021 here: Online Tax Software Canada 2021 | TurboTax® Canada (intuit.ca)
For more information, please see our TurboTax FAQ:
How do I start a new tax return in the online edit... (intuit.ca)
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