If you are a VAT-registered business in another EU country and have supplied us with a valid VAT number, your invoices show 0% VAT under the reverse-charge mechanism (Article 196 of the EU VAT Directive).
You are responsible for accounting for the VAT in your own country through your periodic VAT return — you both charge and reclaim it, so for most businesses the net effect is zero.
Customers in the same country as the invoicing entity are charged local VAT at the applicable rate. Consumers and customers outside the EU are handled according to the relevant place-of-supply rules.