Solution : https://service.sap.com/sap/support/notes/1377320 (SAP Service marketplace login required)
Key words :
expense/revenue account assignment - correct, system issues error ff 796, correctdebit/credit indicator, expense account, terms ff 796, account posting, tax amount, manual tax, dekrtab reason, transaction miro
Related Notes :
| 885799 | DYNPRO_FIELD_CONVERSION with manual tax in the vendor |