Solution : https://service.sap.com/sap/support/notes/1012077 (SAP Service marketplace login required)
Key words : 
accounting documentcomponent         component typebuzei_rseg        buzeibuzei_rbco        buzeimaintain, accounting documentcomponent         component typebuzei_bseg        buzeibuzei_taxline     buzeimaintain, normal function module                            start immed, e_buzei          type        buzei             xtables  parameter, empty includeactivate include ----------------------------------------------------------------------implement, menu -> extras  -> enhancement categorymark, accounting documentprocessing type, ----------------------------------------------------------------------change function module, structure / data type, type   optional  i_bz
Related Notes : 
       
| 1016584 | Multiple account assignment - nota fiscal items lost | 
| 969995 | Multiple account assignment - nota fiscal items not update | 
| 949642 | MIRO: balance error (PO with multiple-account assignment) | 
| 883582 | MIRO: balance error (PO with multiple-account assignment) |