what is a conditions other state purchase sales tax?

Answer 1

I'm not sure if I understand your question correctly, but I will try.
If you purchase something in a state that has lower sales tax than you own, you are supposed to claim it on your tax return and pay the difference between your state's tax and the tax you paid. But I am not surehow it works if you pay more in sales tax than you usually would. You may be able to get a credit for the difference, but I would not be suprised if you can't.

Answer 2

If you are in a state under vat you do not get any benefit. You have to pay CST