Please try as below:
1.Create a 2nd condition type for for Tax ( in my example created HWS2) in which maintain one new access seq which contains Sales org and sales document type. and maintain the condtion records for this condition type as 50% .
2. And the HWS2 condtion type should be as below:
3. In V/08 place this condition type below to first tax condition type.
And see the below results
And when you create the sales order for the same customer with other sales org,system will not determine the 2nd condition type, it display only the first tax condition type since the sales org is different for which we have not maintained the condition records.
And please let me understand why you want to add the 2nd tax condition values to Net Value. Are you not paying this amount to Govt ?
And please try to provide for which country it applies so that it would be helpful to many people to understand the real time requirement and also can provide the maximum possible solutions.
thanks,
Srinu.