The plugin has a whole series of tools to show, on the checkout page, the tax fields necessary for electronic invoicing, also based on the target customers to which you refer.
By activating more than one type of fiscal document, the user will have a selector available to choose the one suitable for him and, consequently, only the fiscal fields appropriate to the choice will be shown in the checkout form.
In addition to checking the validity of the Fiscal Code and VAT number, it is possible to determine which fields are mandatory or not, in particular those strictly related to electronic invoicing.
These fields may be made mandatory even for Italy only, given the need to issue electronic invoices.