Sale Partner Shipping Default Partner Invoice

This module adds a new field called "Default Invoice Address" on contacts. You can find it on the contact form, right after the address block, and also on the small contact form used for child contacts (for example, a delivery address belonging to a company).

On a sales order, when the shipping address is a contact that has a default invoice address defined, Odoo automatically proposes that contact as the invoice address. This happens through the standard computation of the invoice address, so it follows the normal behaviour of the sales order: if the shipping address changes, the invoice address is recalculated accordingly.

If the shipping address has no default invoice address, nothing changes and Odoo keeps its usual logic for choosing the invoice address.

The module touches the contact model (res.partner) and the sales order model (sale.order). It does not add any new menu, report, or scheduled action; it only adds one field on the contact form and one automatic rule on sales orders.