Glad you came here for support, bweiss.

QuickBooks gives the prompt to ensure transactions under the main customer name or sub customer name will not be automatically deleted.

In this case, you'll want to delete and recreate the invoices under the sub customer that you want to move. Make sure to get a copy of the invoice information before deleting it so you will have a reference.

I know that you are familiar with moving the sub customer but still allow me to share the steps with you:

1. Go to Sales and choose Customers.
2. Select the sub customer you want to move.
3. Click Edit beside their profile.
4. Change the parent customer name under Is sub-customer field.
   
5. Click Save.

You can also run the Customer Contact List report to review your customer information.

Here's how:

1. Go to Reports.
2. Enter Customer Contact List on the search field.
3. Click Run report.

If you want to review the invoices you made, run the Invoice List. Pull this up by going to the Reports menu at the left pane then type Invoice List on the search bar.