As per the last Pay Commission of Central and State Govt have the different Pay Structure and different salary benefits given to the employees. D.A. Rate have also differ from Central Govt employees to other State Govt employees. 
Below given an Excel Based Income Tax preparation Software which can prepare the Income Tax for both of Central and All State Employees in one Software. 

This Excel Based Software can prepare at a time Tax Computed Sheet + Individual Salary Sheet + Individual Salary Structure for calculating the Gross Salary Income + Automatic HRA Calculation + Automated Form 16 Part B and Form 16 Part A&B both for the financial year 2013-14 and Assessment Year 2014-15. In this Excel Based Software more one facility that the all of Income Tax Section have in brief which you can easily guess the all Section. Although the New Tax Rebate Rs.2000/- U/s 87A which is also calculate automatically.

Click here to download the Excel Based Software All in One