My shopping cart was fully functional until I changed the store template via the Wizard instead of using Preferences - Layout & Color Theme. Now, the shopping cart will not add sales tax by zip code, nor will it base shipping on the cart value.
The only advice this forum and my web hosting company has been able to offer is; check the settings for both via Commerce Setup. Of course I checked these settings before asking for help.
I feel my only option now is to dump the original store and create a new one. Any advice on the best way to do this is greatly appreciated.