14 March 2018
You have to compulsory fill Aadhaar Number or Aadhaar Number application number for filing itr form. So you can apply Aadhar you can file by acknowledgement details.
15 March 2018
If it is linked you can e verify your tax return also it is easy to reset login id through Aadhar OTP, For filing tax return you have to mention Aadhaar Number without that you will not be able to file your tax return.