Visit Carnival.com and click the "Log In" hyperlink, then enter your email address and password.
Click the "My Cruise" link, then click the "My Documents" link.
Fill in the information on the "Log In Now" screen. You'll need your booking number, guest last name and date of birth, the ship and sail date. Then click "Continue".
Click "Print Luggage Tags". Make sure you have sufficient paper in your printer.