Sorry to burst your bubble but if it is a missing paperwork that you should have turned in initially with your application, The initial receipt date of your application would change to the day they finally receive the missing paper work. That was what they did to one of my friend. Good luck man. The wait to take this exam is real.
If you gotten a deficiency letter (aka one of the documents is missing like transcript, self-query that expired, proof of intern license), then the turn around is pretty quick. 1-2 weeks