This TurboTax FAQ lists some possible reasons why TurboTax is telling you that you are self-employed: Why is TurboTax telling me I'm self-employed?
Unfortunately, there is no way to downgrade a return. You would need to create a new return to go back to the original 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.
