If you're a EU based company and are VAT registered, simply enter your VAT number in the cart before going to checkout. We'll automatically validate your registration, and make your order ex VAT.
Your VAT number may not work on products which are configurable - i.e. bundles where you can choose various options before adding to cart. If this happens simply email email@example.com with details of what you'd like to order along with your VAT number, and we'll manually raise the order and email you a link for payment.