To close or delete a listing you will first need to be logged into your account.

Once logged in you can go to you listings by selecting Selling

Then selecting Listings from your dashboard

Next find the listing you want to close/delete and click on the ellipsis to right of the listing

Then select Close/Delete.

NOTE: Closed listings can be relisted later if the seller chooses. Deleted listings will have to created again, there is no way to retrieve a deleted listing.