Amazon soon may have to collect Massachusetts state sales tax on residents, because it will have a physical presence in the state. Essentially, this gives Massachusetts reach throughout Amazon’s entire corporation, as long as the customer is a Massachusetts resident. It’s not too dissimilar from how Massachusetts would really, really like you to declare everything you’ve purchased in other states so that they can tax those, too. No. The only system that makes sense is to declare a point of sale associated with a specific location (the warehouse that Amazon will be supplying you from, perhaps), and apply the appropriate taxes from that location. And Massachusetts residents like myself can go shop in NH and bring back items without declaring them until the state realizes that taxes are a competitive marketplace, and stops whining because it’s too fat and corrupt to compete effectively.