Let me share this overview I have about the customer statements,@johan3.

To show the credit balance on the customer statement, make sure to select the Balance Forward statement type. I’ll provide you the steps on how to perform this.

Here’s how:

1. Go to the Sales menu on the left panel.
2. Select the Customers tab.
3. Check the box beside the customer you want to make a statement.
4. Select Create statements in the Batch actions drop-down ▼.
5. Choose the type of statement Balance Forward in the Statement Type drop-down ▼.
6. Fill in the date fields and hit Apply.
7. Click Save and Close or Save and send.

If you're trying to correct an opening balance for a reconciled account, you can visit this article here: Customize and view customer statements.

If you have any other questions, please reply to the thread in the comment section. We’re here to help you. Take care.