Easy way around it - all deliveries to Texas are shipped from an Amazon warehouse in New mexico and, deliveries in NM are shipped from Arizona etc.
All the orders are taken by Amazon Bermuda.
It does not matter where you ship from, if you have a "presence" in the state you get dinged for sales tax on sales to residents in the state (or at least that is what TX and a lot of other states are claiming...)
But the warehouse in Texas will be owned by Amazon(texas) inc and the delivery was from a completely separate company Amazon(NM) - they all happen to be owned by Amazon(Bermuda)