Unfortunately, there is no way to downgrade a TurboTax product once it has been upgraded. If you are using TurboTax Online, you’ll need to start a new return to change your product. To start a new return, select “Start a New Return” from under “My Returns” in the top left corner. Once you have started your new return, you can select “View All Returns” from under “My Accounts & Returns”. Then delete the unwanted return by clicking the small Trash Can next to it or “Delete” under the return’s name.
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