Income which is earned outside India by an NRI is not taxed here. An NRI doesn’t have to pay tax on the interest income in a non-resident external (NRE) account or foreign currency nonresident (FCNR) account. But you must be careful about taxes you pay in your new home country as some income that is exempt in India is taxed abroad.
Check the following articles:
http://www.investmentkit.com/articles/2012/01/income-tax-exemptions-for-nris/
http://www.investmentkit.com/articles/2012/04/taxation-rules-for-nris/
Hope it will help you.
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