Make sure after that you have bought the whitelist, you first begin on this forums thread;
https://schoolrp.net/forums/role-rank-requests.171/
After you're there, grab the format for role requests from the pinned forums post, then begin to make a post- Filling out the information in the format and requesting which animal you'd like to be, and the age of your animal; Be sure to also include proof of you purchasing the animal whitelist for the account you request the tag for
After that, you'll have to wait until and admin+ responds to your thread with further information!