welcome.,Just make sure to download e-aadhar. :)

Hi, 

 It's not mandatory to link email id with adhaar card for basic registration. However, which ever photo ID you give , it should be shown during exam time. You just have an valid ID with updated phone number and email id. 

Good Luck. For any other queries, you can contact here. 

Dear Hima, The Supreme Court said unique identification number Aadhaar cannot be made mandatory for any national entrance examination for now. So its not mandatory for you to give your Aadhar card details. You can select any other form of Identity proof.