If you move from USA to another country you would like to change your Amazon settings due to buy your books in the “new” local Amazon store.

The first step is to login into your Amazon.com and open the Manage your Contenent and Devices page. Then you have to go to the Settings tab and modify the Country Settings field. Fill in the requested information and press Update.

A pop-up advice will appear on the upper part of the webpage:

Great news! You can now shop for digital content at Amazon.it in Euros
Learn more about transferring to Amazon.uk (de-it-es)
Have you moved recently? You may change your country on the Manage Your Content and Devices page. 

Click on “Learn more about transferring to Amazon.uk (de-it-es)” and then, when in the new page, click on the yellow button “Transfer your Kindle account to Amazon.uk (de-it-es)“

Now you will be redirected into your new national Amazon’s homepage where you will be requested to login again. A welcome message confirms your account transfer and you will able to start managing your local account.