When creating the client, select "Individual" in the "New client" window.

Then enter their country of residence in the "Country" field. BILLY automatically suggests the VAT rate suited to their situation — no calculations needed on your end.

This time, select "Self-employed/Company" in the "New client" window. The process then varies depending on your client's situation.

Client based in the European Union, registered for VAT

Creating a European client works exactly the same as creating a Belgian client: the European Union has a single business registration system, the VIES system, which identifies a business in the same way regardless of its country.
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Once the client is created, there's nothing else to do on the invoice: BILLY automatically applies the correct VAT rate and adds the required reverse charge statement at the bottom of the invoice.

Client based in the European Union, exempt from VAT

In this case, the VIES lookup won't work. You can add the information manually: name, address, and company number (shown as "VAT" on the invoice, even if the client is not VAT-registered). Entering this company number allows you to send the invoice via Peppol, although this is not mandatory in such cases.

Client based outside the European Union

The automatic lookup doesn't work here either: you'll need to enter all the information manually 💻