In case you want your VAT amount to be refunded you will have to contact our payment provider 2CheckOut.
Here is how to do it:
1. Access My Chaos and sign in with your username and password.
2. Click on Billing -> Invoices.
3. Click on the three-dotted button beside each invoice and then on Request a Change. A Compose Email window will open where you can request your invoice change.
In addition, you can add your VAT number for your future purchases in the Billing -> Billing Information section.