Solution : https://service.sap.com/sap/support/notes/955161 (SAP Service marketplace login required)
Key words :
terms bbp_poc mysap srm tax segment reason, create purchase order screen, default tax code, previous tax code, multiple tax entries, basic data tab, attached correction instructions, purchase order, mandatory fields, system defaults
Related Notes :
| 1039435 | FAQ: Trigger of tax update |