Solution : https://service.sap.com/sap/support/notes/431179 (SAP Service marketplace login required)
Key words :
menu goto -> text elements, include withholding tax codes, deduct withholding tax, withholding tax rate, classic withholding tax, extended withholding tax, withholding tax reports, flag 'dictionary ref, customer business partner, withholding tax
Related Notes :
420894 | RFWT0020: Report to recreate withholding tax data |
363650 | Withholding Tax Configuration for 1099MISC |