Good evening! I would like to know how do I place prefixes for each area. For example, in area 1 the person has to choose the prefix A or B!

You can require tags in the system as a whole and set a closed tag system but there is no way to require tags per forum/area or a prefix for that matter. You're more than welcome to provide this suggestion in our Feature Suggestion forum or I can move this topic for you. Please let me know.

Can you move for me please? @Jim M