[jahewson]

> if I by something from Amazon, the transaction is basically from my bank in DE to WA if there are no Physical Amazon locations in WY. Correct?

Incorrect. What matters is the state (or states) in which the company is "doing business". The exact definition varies from state to state, but in general having customers in WY means that you're doing business there and will (usually) need to register with the state, follow its rules and pay its taxes for your sales in that state.

Your bank is also doing business in DE and will need to follow their laws too, as the other end of the transaction is there.