Taxpayers are requested to go to
“Profile Settings –> Link Aadhaar” after logging to their account to link
their Aadhaar with PAN. This is an optional feature that will enable taxpayers
to e-Verify their Income Tax return if their Aadhaar-PAN linking is successful
and if they have an valid mobile number registered with Aadhaar.
- See more at:
http://taxguru.in/income-tax/link-aadhar-pan-everify-income-tax-return.html#sthash.feG0DQ38.dpuf