Ok So I have been looking through previous threads about Using a Stage name and I know about most of the SAG stuff but my question is... How does a Stage Name Work for everything else like when you get a credit card and stuff like that do you use your real name or stage name and what about your Visa/Passports do they have your real name or stage name? I know your SSN number never changes but how would all of that work with your Stage name?

Your real name continues to be your legal name unless you have it legally changed. Some actors have their stage names in addition to their real names on bank accounts and such. (It's usually listed as "aka"-- "also known as"). Talk to your financial institutions about the specifics of that. Many actors (those who are fairly successful) set up business names (corporations) so that payments can be made to and from those incorporated names.