Billing details
You can find billing details in the user menu on the top-right corner for the dashboard or you can even add them at the moment of your first subscription. In the billing details section you can add, edit and restore his billing details. The billing details are required if you need the invoice. If you are an Italian company, and you declare your billing details, you can be exempt from VAT. While if you are a foreign company you can obtain reverse change.
To add you billing details you can do it in the moment of your first check out or you can add them later submitting the form in the billing details section.
You can add your billing details only if you have an active subscription or if you are buying a new one.
Since you can add more than one group of billing details you can even restore your old billing details from the list you can see in the bottom of the page. To do that you just need to click on the button 'Restore' of your old billing details.