The rules are: on an adult tag you automatically buy a buck and doe tag

zone 1-1 buck unlimited doe tags
zone 2-1 buck 3 doe (you can buy two extra doe tags)
zone 3-1 buck 1 doe
zone 4-1 buck 1 doe

*****zones 3 and 4 have certain times that are buck only********
You dont have to kill any does if you dont want to, i havent heard of the two does before a buck rule