Cash Discount taken incoming Payments

Hi folks,

when we allocation incoming payments to open AR, discounts might be taken from customers.

We use FB05 for this.

Discount GL is automatically chosen (OBXI) and correctly calculated.

However, tax needs to be adjusted as well. This is not automatically done.

What could be the reason for this?

Tax Category field for "Cash discount expenses" is filled with "*".

In case of purchase discounts in payment program F110, it works absolutely fine.

please let me know if you need additional information

Appreciate your help.