There is a guy here that is the Number 1 taxidermist in the world for Turkeys and has won many otherawards for his elk and whitetail deer..
His name is Marc Jordan and he mounted about 15 or so animals for my family members and guys at camp. All were pleased.
He started his own school - at his shop and teaches a class a couple of times a year.
To become a taxidermist in Pennsylvania - you have to take a test and do a certain amount of work and it has to be approved by the PGC - Pennsylvania Game Commission.
http://www.wpst-taxidermy-school.com/Taxidermy-School-Administration.html
If you are sinceer about wanting to become a taxidermist - you would give him a call.