Go to the Tickets section and click on "Payment & Tax".
Choose a payment provider
First you are asked to connect with Stripe or Paypal or both (you can switch between them as you like).
It's free to create an account with either service, only a small fee is charged for the use of credit cards with each transaction.
Choose billing country
This is used to calculate tax on fees and abide to EU and local tax legislation.
Check the bottom for relevant articles.
Insert your billing address
This info will appear on tickets and invoices.
Finally set the Tax/VAT rate
Insert the local tax/VAT rate and name it in your local language.