At what point do I have to register my company in another state as a "foreign" company?
I own a NH LLC. If I travel to VT to demo a product for a customer, does that rise to the level of doing business in VT so that I have to register with VT (and pay fees and taxes)?
Do the rules vary by state? Is there a general rule? Does anybody have a reference to a list that collects which states have special requirements or exceptions?