Where can I add the VAT number and how does it affect the invoice?
The value added tax (VAT) number is an identifier used in countries of the European Union. A business or a taxable person is identified with their own unique number.
The VAT number is needed so that an invoice can be created without taxes, as Reverse-charge applies. Reverse-charge means that the liability to pay the VAT is shifted to the customer. The customer has to calculate and pay the VAT.
You can provide the VAT-number here:
If you don’t provide the VAT number or the VAT number is wrong, the invoice amount will include the VAT-rate of your country.