Solution : https://service.sap.com/sap/support/notes/98143 (SAP Service marketplace login required)
Key words :
attachment sets tax classification fixed material, additional key words plant, user exits mv45afzz, sd business transactions, tax classification, initial plant, service items, order entry, calculated correctly, tkomk-aland
Related Notes :
381348 | Using user exit, customer exit, VOFM in SD |
309425 | Argentinian Fields in Billing Item Detail |
191932 | Incorrect tax classifications in the SD document |
170183 | |
1779 | VAT could not be found |