I have a scenario in which I need to derive the tax code for inbound INVOIC02 Idocs (MM/Logistics Invoice Verification)
from a number of differen fields in the IDoc.
There's a user exit, EXIT_SAPLMRMH_012 however it won't let me read any of the other IDoc segments (why is that, SAP??).
Is there any other way to change the tax code?