Maybe common knowledge but this is what I did:
HS vers: 2.0.0
Joomla 3.0.2
After uppgrade from Starter Edition to Business. (In SE everything worked fine.)
Problem:
As non logged in user, guest. All listings such as product page, product, category, latest product etc. price was displayed: 10 € (10,00 € excl VAT) (The amount 10 € is an example.)
Solution:
System/Taxes/Manage rates/Edit (your created tax key)/ -Do nothing just hit save.
And it works!
/Mathias