The installation is carried out from the Shopify App Store (search for Billit in the App Store). After activating it via the App Store, you will receive a guide and a link for setting up the connection between Billit and your webshop or point-of-sale system.
You can try the integration free of charge for the first 30 days. After that, the integration does not automatically become paid: you will first receive an e-mail asking you to choose a pricing plan based on the number of invoices you transfer. View the pricing here on winkelboekhouding.nl.