If you want to view invoices in a spreadsheet or even keep an external record of your users' invoices, you can export them. You'll see details about the user, the products purchased, any discounts used, where the purchase was made (or from where the card is from), and when it was paid.
To export invoices, navigate to the Sales tab, then go to Invoices, and click on Export CSV.
You will see a message pop up telling you to check your Exported Files. So head to Settings then click Exported Files and you'll see your CSV at the top. Click on Download and Save it to your files.