Let's create a Journal entry to write off the significant overpayment for your supplier, Johann.

Before proceeding, please consult your accountant to confirm the accuracy of your records.

Here's how:

1. Click the + New button and choose Journal entry.
2. On the first line, select an account and enter the amount in the Debit or Credit column as needed.
3. On the next line, choose the other account and enter the same amount in the opposite column.
4. Verify the amounts; the Credit column on one line should match the Debit column on the other. This ensures the accounts are balanced.
5. Enter information in the memo section so you know why you made the journal entry.
6. Click Save and close.
   
   

I've added an article explaining how to enter a prior balance for a customer who owes you money or a supplier you need to pay: Manage outstanding balances for customers and suppliers in QuickBooks Online.

You can always get back to the Community space if there's anything else you need. We're here to help.