Solution : https://service.sap.com/sap/support/notes/137137 (SAP Service marketplace login required)
Key words :
additional key words billing plan, start date january 1st, periodic billing plan, 1st settlement period, attached advance correction, subsequently monthly jan, billing plan, settlement period, subsequently billed, correction instruction 0120024545 0000088511
Related Notes :
| 117367 | Incorrect settlement periods in the billing plan |