Link Aadhaar and PAN made mandatory for income tax filing by the income tax department in India.
We have observed that the tax payers with long names were shortened in a non-standard form during PAN issuance, and is not the case in case of issuing Aadhaar, hence it's very important to link your Aadhaar with your PAN to make sure that the linking is successful before filing your taxes for AY 2017-18 onwards.
Just Click on Income Tax Department's Link to link Aadhaar and PAN and Fill the information to Link. It's easier now and can be done in Single Step
Log in to the ITD e-Filing portal with your registered user id and password.
At the top of the page, click on 'Profile Settings', then Click on 'Link Aadhaar' option
That's all! to link your Aadhaar with your PAN number, once successful, you are ready to e-file your taxes for AY 2017-18 onwards.