Cant delete guest list

You select the square at the top of the "Guest List" page and then an option to remove comes up.

Hi Amanda! To remove all of your guests from the guest list, just open the Guest List tool and click on the box at the top of the list to the left of all of the names. This will select all of the guests and you will then be able to click 'Remove' and confirm that you want to remove them from the entire guest list.