The plugin configuration let you choose where you want to display the estimation and what kind of information you want to show to your customers
The second tabulation is for selecting the fields you want to ask to guest users (post code, city, state)
Demo
Access to updates included for 4 years
A tax rate (between 17% and 27% based on your country) will be added if your address is in the European Union and that you don't provide a valid VAT number or if your address is in France as per the European Union law.