On My Qred, you can download your invoices by clicking on your active loan on the home page. You will then come to the page "My loan". Click on the "View invoices" button to view and download all invoices you so far have received and your upcoming invoice.
On the "My loan" page, you can also navigate to the "Payment" page by clicking on "Due payment" (only if you have an overdue payment) or "Upcoming payment" (the word "payment" is the same as "invoice”). In the "Payment" page, you can also download your invoice.