Troubleshooting tax issues includes the following ...1. What are your store settings for these set to?
b. Basis of Product Tax
c. Basis of Shipping Tax
d. Display Prices With Tax
e. Display Prices With Tax-Admin
2. What Zone Definitions have you created?
3. Inside each of those zone definitions, what country/zone combinations have been selected?
Admin->Locations/Taxes->Zones Definitions, click on "Details" button for each zone
4. What tax classes do you have?
5. What tax rates have you created?
6. What tax class have you associated with your products?
Admin->Catalog->Categories/Products->click on a product to edit it
7. What tax class have you associated with each of your shipping modules?