Electronic Invoicing for Chile

This module connects Odoo invoicing with the Chilean electronic tax document system (SII). On customer invoices and credit notes it adds a document class field, shown on the invoice form just before the payment terms, where the SII document type is stored.

When a new customer invoice is created, Odoo automatically picks a default document type: an electronic invoice (code 33) for normal customers, an electronic ticket (code 39) when the customer's invoicing policy is 'ticket', and an electronic credit note (code 61) for refunds. If the invoice has no taxes, the document type is automatically switched from ticket 39 to 41, or from invoice 33 to 34.

When a customer invoice or credit note is validated, if the company has electronic documents configured, the document is signed in the background. The module also prepares the XML files sent to the SII: a standard invoice envelope and a ticket envelope, each validated against the official SII schemas.

Refunds are handled too: when you create a credit note from an invoice, the correct SII document type is set automatically, and when you use the 'modify' refund option the new invoice receives the matching SII document type. The module also extends the electronic document configuration so that invoices can be selected as the source document.