Earlier quoted context omitted.
I thought with use taxes you owed the remaining difference in tax. Say I purchase a $100 widget in Kenosha, WI with a sales tax of 5.5%, and I live in MI with a sales and use tax of 6%. I would owe MI the 0.5% difference on the $100 which would be $0.50.
No my understanding is that the state wants their full X% -- the whole point of the use tax is "you paid that guy but you're supposed to pay me." If you paid a higher tax rate in another state do you think your home state would be happy with 0% or even reimburse you the difference? IIRC you're expected to get the out of state retailer to reimburse you at a later time and then when you're paying your income taxes you…
In Massachusetts, oddly, if you paid less than the Mass sales tax rate of 6.25%, you owe 6.25% use tax. It's not the delta you owe, it's the full amount. But you don't owe it at all if you paid more than the Mass rate.