Import One-Stop Shop (IOSS) and Features with Sage 200

Any customer selling goods commercially to customers based in EU Countries will need to register in one country and charge VAT applicable to Country where the customer is based. Flags and Processes are required.within Sage 200 are required for this. eg if the Order Value exceed €150. VAT Codes can be setup for each country, it's more the flags that's the more complicated requirement.

https://ec.europa.eu/taxation_customs/business/vat/modernising-vat-cross-border-ecommerce_en