My question regarding income tax in india?

You have not mentioned of any investments you have already made under section 80C of Income Tax Act. You can get a maximum exemption of income of Rs. 1 lac for investment in various eligible instruments / schemes (including insurance) under section 80C. As your tax liability is only Rs. 2815/-, your taxable income falls under 10% income tax slab rate. You have to bring down your taxable income to Rs. 150000/- or less by investing in Insurance policy or any other eligible instrument. The approximate amount of investment required in your case is Rs. 28000/.