Open question: Fedex sticker trouble?

I decided to exchange a product against another and the company gave me a connection to Fedex Web site, therefore I would know a sticker expressions. Instead of reaching, for the printer button, I operated inadvertently the back button. How do I know another sticker reprints? The web site says that „you have a maximum of 5 days to again-print to a sticker afterwards which first times a sticker is produced “, how I this do can?