totally agree with other but if you dont have any acknowledge number, Bank Account number and Answer of secret question then you can submit your password request in helpline mail
You can also.. give your pan card details nd mail it to d email id specified on d income tax efiling site..
Oan card details lyk pan number dob nd registered address
you can mail your PAN details to efiling helpline mail Id and they will mail you a password reset link.
you can mail them at validate @ incometaxindia.gov.in