Thanks for posting back to QuickBooks Community, lilliputaccounti.
I'll be glad to help you delete the previous amounts on the invoices.
First, let me share some insights about the Gear icon and the Account and Settings menu. These options are available in QuickBooks Online. QuickBooks Desktop and QuickBooks Online have different platforms and use their own unique buttons and menus.
As for your main concern, you can open the invoice and delete the amounts by following these steps:
- Select the Customers menu at the top, then choose Customers Center.
- Click the Transactions tab, then select Invoices.
- Double-click the invoice to open.
- Choose the line item you want to delete.
- Press Ctrl and Delete on your keyboard.
- Repeat as needed.
- Click Save & Close.
That should do it. Let me know if you have other questions. I'm always here for you. Have a great day.