Taxation is heavily depended on the country listed on a customer’s address. Work 365 has active countries globally as available through Dynamics 365.
Countries identified on a customer’s address in CRM should either have the country name, or one of the country aliases identified under Work 365 Tax Countries. If an address does not have an identifiable country name or one of the recognized aliases, Work 365 will not calculate taxes on that customer’s invoice. To fix, either the new country alias must be added, or the address must be updated to one of the recognized country aliases. Similarly, any specific regions or states on the account address should also match the identified names or aliases of the region/state in Work 365.