The attached excel based income tax calculator of FY 2013-14 containing 6 useful sheets i.e. IT rules, tax calculator, NSC interest calc, house rent receipt, computation sheet and concise calc. The file is basically compatible with excel 2003 version. The tax calculator is auto type, controls and validation limits assigned at cell levels as per to IT rules and provisions. With this utility you can cross check with the payroll deductions of Income tax.