Solution : https://service.sap.com/sap/support/notes/1134257 (SAP Service marketplace login required)
Key words :
DMEE_TREE_NODE J3TX J_3RTAX21_07 J_3RTAX21_09 Electronic VAT Return Unicode codepage
Related Notes :
| 1439914 | J_3RTAX21_09: New VAT declaration (Electronic format) |
| 1319517 | Unicode Collection Note |
| 895804 | Problematic rows in table DMEE_TREE_NODE |