I just want to enhance this screen in transaction PA30.
I want the payroll identifier (PAYID) to be filled automatically depending on wage type field and payment date field.
I tried to create implicit enhancement but the available location for it is after all the modules as the following image, so its not getting called.
Also i tried to copy the standard program and transaction to ZPA30 AND ZSAPMP50A and modify it.
but it didn't work because it has a lot of include files that are dependent on each other.
I just wondering how to enhance this code.