Solution : https://service.sap.com/sap/support/notes/538265 (SAP Service marketplace login required)
Key words :
source code corrections, withholding tax codes, withholding tax reason, withholding tax, automatic clearing, programs sapf124, customer accounts, system displays, customer subject, bsid-qsskz
Related Notes :
500429 | SAPF124/E: Cust. docs can be cleared despite withholding tax |