There are 2 links on the KEA website. One is where you have to register with KEA and the other is where you have already registered and you have to only upload your NEET Roll number. If you are registering for the first time, please use the link: http://164.100.133.71/ugneet2020appd-1/UserRegistrationForm.aspx . But if you have already registered and are trying to upload your NEET roll number, use the link http://164.100.133.71/ugneet2020appd-1/Default.aspx . There might be a technical issue but please do try again. If issues still persist, please reach out to: keauthority -ka@nic.in