How can I register a user of a legal entity in a social network?

Question

User identification

Good evening! Tell me please.
If I want to make it so that the portal shows which user is registered as a legal entity or a regular user. How can I make a convenient switch when changing the user type.
For example. during the initial registration, the user can register through the social network VK or FB;
And for a legal entity, you need to add brief information about the company, and then add information about its representative.
Need advice on how to come up with a handy user type switcher during initial registration
. Any advice?