i have a complex problem.
I have to apply VAT taxes only to private users and not to companies. Now, i have this idea:
in the registration form, i add a select field (by using extrafields in virtuemart) where the user can select if he is a private or a company. After this step, i calculate the taxes only if he select "private"...
Now: how i can use in php files, the "PHPSHOP_SHOPPER_FORM_EXTRA_FIELD_4" ?
Is there other idea?