Good day How do you run finance charges on overdue customers in QBO?

Good day, irene18.

We can open the Accounts receivable ageing detail report to have a list of the unpaid transactions. Let me guide you with these steps:

1. Click the Reports tab.
2. Enter and select Accounts receivable ageing detail.
3. Click the Customise button.
4. Click the Ageing drop-down.
5. Select Report date.
6. Enter the Days per ageing period, Number of periods, and Min. Days Past Due.
7. Click the Filter drop-down.
8. Tick Customer and then select Select All.
9. Click Run report.

Also, if you want to export the report to Excel, you can  check this reference: Export your reports to Excel from QuickBooks Online.

That should do it, irene18.I'll be around if there's anything that I can help. Keep safe!