Globalization studio enables us to set up tax calculation rules. With those rules, we can for example change the sales tax group based on certain conditions.

However, when creating a new sales order, the rule will only be executed, after pressing the Sales Tax button, manually. This makes the process more complicated and manual, especially if sales invoices are posted via a batch run.

Therefore, I suggest to trigger the execution of the tax calculation rule when posting the sales invoice, automatically.