Shopify doesn't offer a default place to store a customer's or an order's VAT ID. Therefore, every app that uses the VAT ID (e. g. billing apps) has its own idea of where the VAT ID should be and how the field should be named.

Because B2B Handsfree tries to support as many of these apps as possible, we have to put the VAT ID in multiple places and therefore the VAT ID shows up multiple times with different labels.