If you want to see the list of your invoiced sales orders, you can do it in 2 ways. The first way is to filter the sales order list
The second way is to go straight to the invoices report.
Sales > invoices
This list will show you the invoice number, date and time of created invoice, customer, sales order number (which is a hyperlink, so clicking on it will lead you straight to that sales order), date and time of created sales order, status, amount, amount with tax included and warehouse. You can also add more columns (which can help you to filter the list and create custom reports) - tag field, city and owner. The owner is the user who created the invoice.