I did that. Worked in deluxe edition, finished my taxes and during the review it said I need to change to premier even though I didn't have any stock sales or other items that warranted premier. At that stage it didn't allow me to go back to deluxe.
Finally I called TT support and the associate did a remote look-in and gave me a code that gave me a discount on final check out commensurate with TT Deluxe.
