How to change your shipping preferences on Amazon.
You can update your address, payment method, and more on orders that haven't yet entered the shipping process. Orders that have entered the shipping process can't be changed.
NOTE: Sellers can't change the shipping address for you once you've submitted your order. If you need to update the shipping address and the item hasn't shipped yet, you'll need to request a cancellation and order again.
Go to your account (amazon.com/your-account), check the order summary and click the "Problem with this order?" button to find contact information for the seller.