Here you can see the list of available tax classes. You can edit/delete items in the list. You can add a new option using "New tax class" button. After clicking the icon in the header of the Actions column, a context menu is displayed, offering options for export of listed data to various types of files.
Page url: http://devnet.kentico.com/docs/6_0/contexthelp/index.html?tax_classes_list.htm