You cannot change the details if you have entered your Aadhar card no# as the Id proof. And if the Aadhar card details are wrong, it cannot be changed either. Now you have to re-register with a new Email Id and mobile number and fill up the form all over again. That means a new payment all together again. You can check the complete application process at our page, https://medicine.careers360.com/articles/neet-application-form.