Note that when you update that information you cannot create invoices that contain items sold before the change with items sold after the change. If the same buyer bought before and after the change was made, you will have to create separate invoices in order to get all the sold items covered by an invoice.
At the main bar on the top of the screen click on HOME, then scroll down to MEMBER'S AREA and click on that. There will be a menu that appears. The option to set up PayPal payments is in the right column.
