Field help (TSVJOU) 

Journal code assigned upon invoice creation. It will be used upon invoice posting.
This field is optional. It is only possible to enter a journal code whose legislation and group setup is coherent with the setup of the invoice type and journal type.
SEEREFERTTOThe general principles linked to the multi-legislation setup are detailed here.

If it is not entered, the journal code will be determined by the setup of the automatic journal, otherwise via the journal type.