Nearly 5 years have passed since this request was made.  It is essential that there is an ability to list the sub-customer or project name on invoices and statements.  I also don't see what is complicated about adding a checkbox to allow this information that is already in QB to be displayed in the heading of invoices and statements.  This would allow consistency, clarity, efficiency, fewer questions from the customer.

Please, please, PLEASE add this functionality that has existed in QB desktop for decades.