n some circumstances, it's straightforward to change the country configured within your Google AdSense account using the AdSense Web interface. This is not possible for certain countries, or if you view your AdSense earnings in a currency that Google does not offer in your new country. In these circumstances, you must contact Google to open a new AdSense account with your updated address details.
Instructions:
1) Open your browser and go to the Google AdSense home page. Log on using your Google username and password.
2) Click the red link at the top labeled "Try the new AdSense interface."
3) Click "Account settings," underneath the "Home" tab.
4) Locate the "Account information" section, and click the "Change country" link next to the address.
5) Select your new country from the drop-down list and click "Continue." An error message will appear if the country you select is not available due to Google's restrictions. Otherwise, your country is changed.
Tips and Warnings:
Google lists the countries that you cannot select using this method as Bangladesh, China, India, Indonesia, Malaysia, Nepal, Pakistan, Philippines, Singapore, Sri Lanka, Thailand and Vietnam. You must contact Google to open a new account in these countries. Google publishes a list of reporting currencies online if you wish to check if the currency that you use is available.
Source - eHow
