Invoice is a document that is given to a buyer by the seller for collecting the payments. Invoice covers the total cost of the purchase or services by a buyer. Odoo sales module provides the invoicing feature.

First we should install the Odoo Sales Module.

Go to Sales Module → Configuration → Settings →Invoicing.

In the invoicing tab, we have two options;

 Invoice what is ordered: Invoicing is done when the sales order is confirmed.
 Invoice what is delivered: Invoicing is done when the delivery is completed.

Choosing Invoicing Policy:
When we open any product page, there we can see the sales tab. In this sales tab, we can choose the invoicing policy.

• Sales 1
• Sales 2
• Sales 3
• Sales 4