Dear Ludwig,
Could you advise how to do adjustment posting? FYI, this invoice was posted on December closing and related to overseas sales.
Finance side said that they insist to do reversal if know the reason of this issue & posting again in January closing. They know that the amount will be a bit different due to exchange rate.
I also checked the AOT table: TaxTrans & CustInvoiceJour, the GST code is follow posted GST sales tax (ZRE), instead of SO line setup (OS). Is it advisable to change the data direct in AOT?