To SELL or Not to SELL...??

Hi - first, having a difficult time accessing the Answers in this system or discussion, how do i see the Answers?     Second - i am crafting my SignTalk and already planning/Booking my first room (30peep) - a thought popped in to my head, do we need a License to Sell - Coaching, Items, E-Books, etc???  Im a licensed Real Estate Broker, so Coaching for Investment properties is HUGE, but if i sign people up on a $250/hr coaching session...will i need some Legal document or License or documents??