Welcome and thanks for joining the Community. I'm here to help with your Finance Charges in QuickBooks Desktop.
Before you start assessing finance charges, please make sure your QuickBooks Desktop software is on its current release. Updating your file gives you access to the latest features and fixes, improves software performance and stability.
Once updated, try applying the finance charge and see if it works this time. You can do that by going to the Customers menu, then selecting AssessFinance Charges.
However, if you're still getting the same behavior, try running the Verify and Rebuild Utility to fix data issues within the company file. Here's how: