1. NRIs whose taxable Indian Income exceeds basic exemption limit or who have earned short-term or long-term capital gains from sale of any investments or assets are liable to file income tax return in India, even if the gains are less than the basic exemption limit.
2. Exception: If taxable income consisted only of investment income (interest) and/or capital gains income and if tax has been deducted at source from such income, there is no need to file tax return.
3. But please remember, for claiming refund of excess TDS, filing tax return is compulsory.
4. Types of bank accounts for NRIs: NRE, NRO and FCNR.
5. Funds in NRE savings accounts are held in convertible rupees - principle and interest are fully repatriable. Interest is fully exempt from tax in India .