What's the point of this module? There are different types of vat (SIRET, APE, DNI, maybe more) but they are all different. For example in Estonia there are two letters and nine numbers. Company register number is eight number. When I enable the B2B mode then only the opportunity to use these numbers is when I change in file ... classes / validate.php APE and SIRET check. More precisely I should comment on this part where the actual check is made, so the function return exactly the same that was input. Is there any other method also ? Maybe I'm doing something wrong ?