One of the features of the entrée system is the ability to invoice using multiple company invoice headings. (not to be confused with the entrée multi company add-on feature)
•This feature is useful if you invoice under two or more company names.
•Select the company invoice heading that should be used by clicking the drop-down button and selecting one from the list.
•This feature is not available when working with Sales Orders.
In order to use this feature, you must first define at least 1 alternate company on the Company Invoice Headings tab of System Preferences in the System ribbon menu.
•The Allow Invoice Heading selection while in invoicing option must also be enabled here.