Solution : https://service.sap.com/sap/support/notes/961678 (SAP Service marketplace login required)
Key words :
batch input session, relevant support package, post input tax, fr message class, make direct postings, ledger-specific postings, direct postings, tax accounts, tax reason, error message
Related Notes :
| 877456 | FB50L: 'Calculate Tax' indicator is not grayed out |