Let's say I'm a confetti enthusiast. Confetti for parties, confetti for halloween decorations, confetti for everything. In this hypothetical example, I want to sell confetti online, and in person when I have the opportunity to make sales. My partners and I make the confetti in Texas, and we sell it online across the country and in person in, say, New Jersey and Connecticut.
If we were to incorporate Wonderful Confetti LLC in Delaware, and I did actually check it's available — for the sake of the question of course — could I manufacture my confetti in Texas, sell it in person and through local retailers in New Jersey and Connecticut, and online through platforms like Shopify across the country? Would I need to register as a foreign entity in the states of manufacture or sale, if all of us confetti enthusiasts are partial owners and not employees? Where's the line?