Solution : https://service.sap.com/sap/support/notes/560302 (SAP Service marketplace login required)
Key words :
tax base amount changeable, tax base amount, peru pe reason, purchase order item, transaction miro/mir7, tax tabpage, account item, terms miro, sales/purchases, calculation procedure
Related Notes :
| 719340 | MIRO FB60 FB70 - tax base cannot be changed |