Set Italian VAT for EEC companies not registered with VIES

[spexy90]

Good morning,
I'm trying to set my ecommerce rates correctly. I should have a setting as follows:

1. for private individuals in the European Economic Community, I have to set the rate of the destination country (and this is done).
2. For companies in the European Economic Community registered with VIES I must remove the rate (done with the Advanced VAT Manager module)
3. For companies outside the European Union I have to remove the rate (done with Prestashop tax rules)
4. Finally, for companies in the European community not registered with VIES I should add Italian VAT.
   How can I proceed with this last point? Is it possible to do this in Prestashop without additional modules?

Thank you