I have tried asking about this though live chat but still having the same issue.
I have run marketpress for a couple years on http://www.sikhfoundation.org.
We only charge sales tax to people in the same state as the foundation. This was never a problem with marketpress before - as long as I set the base state. But as of a few months ago, sales tax is being added everywhere. I have tried different states and countries and any order I try now shows tax.
I have been told by live chat that this was never a feature. That marketpress never allowed tax for just the base state. But I know it has.
I even found this, an older post - where one of the heads up in the company say it is a function.
Look for Aarons response.
This issue has been unresolved, and even when I tried another fix - having paypal charge the tax instead of marketpress -- the tax that paypal tried to add seems to get removed after a person is set back to the store for the final review of their order before submitting.
Please help with this - it is getting very frustrating for myself and the foundation.
I keep wordpress updated - just did the latest one tonight
I have Version 18.104.22.168 of Marketpress
Using Hueman as a theme.
I have granted support access as well