Welcome Justin
the Fitness test is important,
P90x is a "little" tough so you'll need to be in shape to embark on this program.
the fitness test help determine your level of fitness, and whether or not you should get in shape before applying to be enlisted in the Sparta army.
but it sounds like you are already ready to go as you're already doing very well.
the link below has a spreadsheet in which you will find the fitness test.
http://www.weightloss-hq.biz/weight-loss-forum/p90x-forum/p90x-classic-routine-excel-spread-sheet.html