To edit a one-time charge, navigate to the profile of the student whose invoice you want to alter. On the Administrator Dashboard, you can start on the Invoices page under the "Billing" tab and filter by "Unpaid" or "Overdue" invoices. Find the student's name, click their three-dot icon on the far right of the table to open the drop-down menu, and then click "View." This will take you straight to the "Payments" tab on the student's profile page. You can also start by navigating directly to the student's profile.
On the student's profile, find the invoice you want to edit and click the corresponding 3-dot icon on the far right of the table. A drop-down menu will open; click "Edit."
A pop-up will appear with options to edit the item name, rate, quantity, discount, due date (the date the invoice will be added to the student's balance), and description. When you're done making changes, click "Save" to save your changes and exit the pop-up.