Solution : https://service.sap.com/sap/support/notes/134405 (SAP Service marketplace login required)
Key words :
system creates noted items, incorrect assignments occur, additional key words, attached advance corrections, incorrect tax amount, billing items, -added tax, billing plan, payment dates, instalment plan
Related Notes :
| 180344 | SD/FI transfer of down paym.req. with payment deadline |
| 113347 | Down payment process. as of Release 4.0x (standard) |