Navigate to Transactions >> Patient transactions.
Enter patient number and click enter. All the transactions for the patient is displayed.
If entered charges do not have a check box it means there are payments made against it. If you want to delete such charges then first delete the payments and then the check box will be visible.
Check mark the transactions that you want to delete and then click on "Delete" button.
Message to confirm delete is displayed.
After charges are deleted confirmation message is displayed.