ClearTax

ClearTax is authorised by government of India for e-filing. The site is simple to use and helps you prepare and file your taxes online.
It is a simple five step process for which you have to pay Rs 249 for one year for an individual and Rs 749 for business and professions. The highlight of this site is women can file Income Tax Return for free.

TaxSmile

TaxSmile allows individuals, NRI and corporates to files taxes. They have different tailor made plans like Taxsmile silver, Taxsmile gold and Taxsmile prenimum. For non resident it is NRI premium.
The plans are charged accordingly Rs 250 + taxes for silver, Rs 400 + taxes gold, Rs 2000 + taxes premium for Indian tax payers and USD 69 Rs 3100 for NRI customers.

TaxShah

Taxshah is an authorised site by government of India for filing taxes. E-Filing through this website can be done in 3 simple steps.
Taxshah offers different plans starting from Rs 181 and exclusive package is for Rs 2580.

TaxSpanner

TaxSpanner is a government authorised site for e-filing. It has been ranked best online tax preparer (by Money Today in 2009 and by Mint in 2010). 

It is the only private website that facilitates e-filing of ITR-4, meant for taxpayers with income from business or profession.

MyITreturn

MyITreturn is India's largest Income-tax e-Return Intermediary (ERI) recognised by the Government of India. They provide you 24 hours service, you can file returns anytime and anywhere.

Income Tax India

Income Tax India is a website that offer tax related services by the Income Tax Department, Government of India. They have helpline numbers for the taxpayers which will be functioning 24*7 during month of March.