We recommend that you set up what countries (and states) are to be defined in the CMS system before you launch your on-line store. This configuration determines from which locations your on-line store will accept your customers' orders. Besides, you can specify different tax classes with different rates for each country (or state) and then apply the taxes to particular products and shipping options.

 

You can perform the task in Site Manager -> Development -> Countries by Deleting () from the list of countries (or states) the items you are not going to use.