Releif under section 89

Dear Sir,

Assesse is women assessee And want to know the tax releif u/s 89 of the income tax act for the A.Y. 2013-2014

The Total Income For F.Y. 2011 - 2012 (AY 2012-2013) was Rs. 90000/-

The Total Income For F.Y. 2012-2013 (AY 2013-2014) is Rs. 236000/-. (This includes Rs. 36000/- salary arrears of FY 2011-2012)

Now as the arrears of Rs. 36000/- of FY 2011-12 is paid in FY 2012-13, the total income became taxable and tax is Rs. 3600/-, after basic exemption.

Please guide me the tax releif which will be available in calculation of tax payable for FY 2012-2013.

Thank you.