If you need to change the address of something you've already purchased- just make to do that quickly. You'll only be able to update the address before the seller ships. To change your address, tap your profile photo at the top right of your app then ‘Purchases & Sales’. From there, you should be able to update your shipping address directly on the purchase if the seller has not printed the label yet. If the seller has printed the label, please use Contact Support.

You can also update your shipping address directly from the checkout page when you're purchasing something or by tapping on your profile photo at the top right of your app and going to ‘Account & Settings’.