Updating existing client invoices in your GigaBook account
In the GigaBook dashboard, click Invoice icon from the side menu.
Or hover over Invoice icon and then click Search.
2. In the Invoice page, select the invoice to be updated.
2. In the Edit Invoice modal, do the following steps:
Make the necessary changes.
Add line items, update contact information, address, and invoice terms.
Click Save and then click Send.