When you start your return, choose the Free option.
If you have started your return in a different product, or you have upgraded or
added features to your TurboTax return, there is no way to downgrade or remove
the extra features. You would need to create a new return to go back to the Free
product.
To start a new return, select “Start a New Return”
from under “My Accounts & Returns”. Once you have started your new return,
you can select “View All Returns” from under “My Accounts & Returns”, and
delete the unwanted return by clicking the small Trash Can next to it.