Hey there again, @PTELanc. 

Thanks for coming back and giving some more insight into your issue. 

Since you're still unable to see the "Balance Due" field on the invoice when previewing, I suggest trying some troubleshooting steps to help resolve this problem. 

Using a Verify and Rebuild tool could help to fully load this information on the invoice. Use the link below to go through the steps and details about this tool: 

Verify and Rebuild Data in QuickBooks Desktop

This should do the trick. If not, please let me know so I can determine the best solution for your business. Take care!