I appreciate you for getting back with additional information, michele49.

A negative customer balance can be resolved by applying credit memos to offset the entry. In your case, we can create a journal entry. This allows you to move money between accounts and force your books to balance in specific ways. However, I'd still suggest consulting an accountant first to make sure correct accounts are used.

To create a journal, you can follow these steps:

1. Select + New.
2. Click Journal entry.
3. On the first line, select an account from the Account field. 
4. On the next line, select the other account you're moving money to or from. 
5. Check the amounts - you should have the same amount in the Credit column on one line and the Debit column on the other. This means the accounts are in balance.
6. Enter information in the memo section so you know why you made the journal entry.
7. Choose Save and new or Save and close.

To learn more about Journal entry click on this article: Create a journal entry in QuickBooks Online.

In case you want to review the entries made, you can pull up or print a report for Journal.

To do that:

1. Go to Reports.
2. Search for the Journal report in the search bar.
   
3. Select Customize, then make the following customization

Be sure to get back to me if you have additional questions while working with customer balance. It would be my pleasure to help. Have a good one!