Invoice is the document that offers a detailed description of the purchase including, price, quantity, sales tax, shopping cost, and total amount. Read this article to know how you can submit the Invoice.
Backend
To submit the invoice go to Sales ➤ Orders, you will redirect to the “Orders” page.
Now click on the “View” button from the “Actions” dropdown menu and the “Order and Account Information” page will open up.
Now click on the “Invoice” button, and check the details of the invoice. After inspecting the details press the “Submit Invoice” button.