Certain use cases or situations may require that multiple invoices be created for an Opportunity or an Order or lines from a custom object. Breadwinner Business supports this functionality. 

In Breadwinner Business this is achieved by creating a checkbox field on the Opportunity Product, Order Product, or custom line that holds the products or services to be invoiced. With the checkbox field present and mapped to Breadwinner (see below), and based on the checkbox logic, Breadwinner will only invoice for the Line Items that have the box checked (or unchecked if that is the logic). This functionality has to be set up in the Breadwinner Invoice Configuration Section, see below