PartnerTaxGrpUsage

A PartnerTaxGrpUsage stores a customer's tax registration details for a specific region — most importantly their VAT number (UID) and local tax number. In the ECommerce context this is used to validate business customers who claim tax-exempt or reverse-charge treatment. If a valid VAT number is registered for the relevant region, the system can automatically apply the correct net pricing and tax rules during checkout.

Multiple usages can exist per partner to support customers registered in more than one tax jurisdiction.