Other questions

Thanks @BettyJaneB 

Unfortunately I'm still having issues/questions. 

•  I don't have a sales tab, rather Invoicing where I can then access Customers (not sure if this has any impact as I can gt to the same point via Invoicing):

• Do I need to have the sub-customer marked as "bill with parent" in the sub-customer information?
• I'm able to get the project added the way you describe below. The issue is now within the Projects tab. In the customers pull down on the top, the new projects I add are listed independently from the parent account. It now shows up as Parent Account: Sub-customer. Previously, the sub-customers would nest under the parent account so the drop down list was much more manageable (only showing the parent accounts). 
• The information (invoices, time entries) with these new projects don't seem to be pulling though when converting the sub-customer to a project.