It's more complicated than that. Absent SSTP, if I live in a town with a special sales tax, and I buy furniture from the next town over and have it shipped to

It's more complicated than that. Absent SSTP, if I live in a town with a special sales tax, and I buy furniture from the next town over and have it shipped to my house, I get to pay a lower tax rate. With SSTP, they furniture store has to track my address and charge me the higher rate. I don't think use tax has ever been a factor in intrastate sales tax rate variations so this does change what sort of taxes are required.