Open the Amazon app or website and sign in
Go to Your Orders
Find the order you want to change
Check whether the order has already shipped
If the order has not shipped, select Change shipping address or Edit order
Choose an existing address or add a new one
Save the updated address
If the order has already shipped, contact the carrier or Amazon Customer Service
For future orders, update your default address in Your Addresses
Select Add address to enter a new shipping address
Set the new address as default if needed