Solution : https://service.sap.com/sap/support/notes/614864 (SAP Service marketplace login required)
Key words :
attached source code corrections, extended withholding tax, withholding tax amount, create report z_rfwt0591, execute report z_rfwt0591, withholding tax base, field with_item-wt_qbshh, call transaction se38, withholding tax conversion, transaction wtmg
Related Notes :
| 604050 | WTMG: WITH_ITEM-WT_QSSHH is empty in some documents |
| 390148 | WTMG: Composite note for withholding tax changeover |