Unfortunately, once you have
upgraded or added features, there is no way to downgrade or remove the extra
features. You would need to create a new return to go back to the original
product.
You can go to the Return Manager
(under Tools) and start your return over in the correct product. Then once you
have started your new return, you can go back into the Return Manager and click
the small Trash Can next to the unwanted return to delete it.