please check your name and number in the ug neet 2018 candidate verified list in the ug neet site

Hello

If you aren't able to enter your CET number and it's showing that the number is invalid that might possibly be due to some technical issues and nothing else. Try logging in again in a while and in case you are unable to log in again then contact the university people via a call or email and ask them the reason about the same.

Thank you