Odoo-18.0-20251222/sale_order_invoicing_grouping_criteria/readme/USAGE.md

1. Go to Sales > To Invoice > Orders to Invoice.
2. Select sales orders whose invoicing you want to do.
3. Click on Action > Invoice Order.
4. Click on "Create and View Invoices" button.
5. On that moment, the grouping criteria will be applied, and you will see different invoices if the criteria doesn't match for them.