How do I change from the premier to the deluxe package on check out? as we didn't require the more expensive package.

Unfortunately, once you have upgraded your TurboTax return, there is no way to downgrade it. 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.