Apple - How can I change the country of an iTunes account?

To change stores you can do so on the iTunes Store:

1. Click on your Account in the iTunes Store to go to your Account Page.

2. Click "Change Country or Region".

3. Choose your Country or Region:

Another alternative is to use Apple's Manage your Apple ID site and change your address - next time you use iTunes it will ask you to change your region and verify your address details.