Attachments sent with an eInvoice must first be saved in the ~ DMS ~ tab of the invoice.
Sending rule
The documents must be placed in the DMS before the invoice is approved. Documents added to the DMS before approval are sent automatically as attachments with the eInvoice.
Fiscalisation 2.0 limitations
The Fiscalisation 2.0 technical standard does not allow attachments to be sent later for an invoice already approved. If an attachment was forgotten, the customer must reject the invoice, after which it has to be sent again (see Resending an invoice to F2.0 fiscalisation).
All documents in the invoice DMS at the moment of approval are sent as attachments. Check the DMS content before approving.