Change password

If your Aadhaar is link, then you can select the option of Using Aadhar OTP. After that you can directly change your contact details.

You have to choose other Option. New Mail ID and Mob no. Option has been removed by CBDT

You can use other options to change your password like
1. Answer secret questions,
2. Upload DSC,
3. Using e-filing OTP,
4. Using aadhar OTP

Using aadhar OTP is easiest way to change password, if you have registered mobile number with aadhar
if Your aadhar and PAN is not linked than you can link then at incometaxefiling website