Hi there, Jaynee!
You are really going to enjoy the Fireworks Dessert Party, whether you chose the one at Magic Kingdom Park or the one at Epcot!
If you can see your reservation for your Dessert Party listed under your dining reservations, you should be all set. It sounds like it may be linked to your MagicBand already if that is the case.
When you made your reservations for this special party, you should have received a confirmation number. If your reservation is not yet linked, you can actually enter that confirmation number in your
My Disney Experience account under "link reservations and tickets." You don't have to link it if you don't want to, but if you do, definitely make sure that you have that confirmation with you just in case. I always like to have a back-up just to be on the safe side.
Thanks so much for stopping by the Moms Panel, Jaynee! I hope this helps and please let us know if we can help with any other questions you have!
Wishing you and your family a Pixie Dusted vacation!
~Jackie