Although Avalara has solutions worldwide, they seem to take their cue based on what the ERP or accounting software package supports. Sage 100 is an ERP for the US, so Sage Sales Tax (powered by Avalara) only supports integrations for the US requirements. Yes, Avalara does the VAT calculations, but integrations are probably not available, except for software that is commonly used in Europe (SAP, Oracle, etc.) It would be interesting to know what the integrations are for Enterprise Management (aka X3).