While viewing invoices in the inbox, you will notice that there are check boxes on the left hand side of the screen. If you need to reject an invoice from your inbox, simply tick the correlating box to the left of the invoice. An 'Actions' menu will then appear at the top of this page above the tick box column.
After you choose the Reject option, a small pop-up window will appear. This will show the Doc ID of the invoice (you cannot edit this) and a field for the Reject Reason. This must be filled in, giving a reason for rejecting such as "accidental upload" etc. You can then click the blue Reject button, and the invoice will be sent to the Rejected folder.
Please note: Only one invoice can be rejected at a time.