Our extensions for Magento can be installed in every shop. It does not make any difference whether you start a new shop from scratch or if you have already a shop running.
After purchasing and installing the module, setting everything up was easy. The documentation was very detailed on every step: creating tax groups, customer groups, helping us setting up the tax settings correctly for our country, etc. The module functions like it should. It notifies the customer like it should. Install, Setup, Forget!