Solution : https://service.sap.com/sap/support/notes/459895 (SAP Service marketplace login required)
Key words :
system fills field bseg-qsskz, system generates error message fz326, relevant withholding tax types, classic withholding tax function, adjusting withholding tax information, attached source code corrections, correction adjusts report rfwt0010, withholding tax information, extended withholding tax, withholding tax type
Related Notes :
448108 | ZRFWTCR01: Correction of BSEG-QSSKZ = 'XX' for ext. W/tax |
379529 | RFWT0010: subsequent generation of withholding tax info |