Important Configuration Settings
Kartris prompts for the folder and the URL that it will be running under. In most cases it will have the correct values in these fields at default.
From v1.4 onwards, Kartris makes it simple to configure tax. The tax model used is set in the config system and is selected during the setup. It's not something you'd generally need to change on a live store, but if you do need to change it on a site that is already up and running, you can do this directly in the web config file. Look for this:
<add key="TaxRegime" value="EU"/>
The possible values are: