Which integration type should I choose?
Standard integration is the most common and should be used by almost everybody. You can make a simple integration where you just make invoices in the web-shop and do everything else from Klarna Online. You are also able to integrate invoice management to your business system with this integration.

With Advanced integration you are able to do everything that you are able to do in standard integration. You can also change the order with a function call before delivery. This can be useful if you need to change the orders often before sending the goods. With standard integration, it is possible to do this in Klarna Online. Very important to know about advanced integration is that you are not able to activate through Klarna Online, but everything that you do has to be done by function calls.