Import/Export invoices as Finvoice

This module adds a new electronic invoicing format called Finvoice 3.0 to the Accounting app, aimed at Finnish invoicing.

• On customer invoices, a new Finvoice format becomes available. When the invoice is posted, Odoo generates a Finvoice XML file and attaches it to the invoice. Credit notes are exported as credit invoice type.
• The format is only offered on sales journals, so it is meant for outgoing invoices.
• When you import a Finvoice XML file, Odoo recognises it automatically and creates a vendor bill or vendor credit note from it. It fills in the supplier, invoice number, dates, due date, payment reference, bank account, invoice lines, quantities, prices, discounts and taxes.
• If the supplier is unknown, a new contact is created from the seller details in the file. Bank accounts are also created or matched automatically.
• The module stores the total amounts stated in the imported file and shows a warning banner on the invoice form when these totals do not match the invoice lines, for example when shipping or handling charges are missing.
• Only invoice and credit note files are accepted; other Finvoice document types are rejected with an error message.
• Imported files are checked against the official Finvoice XML schema, and problems are written to the server logs.

It works together with the Finnish e-invoicing code module and the standard electronic invoicing and UBL import features.