hello aspirant,

To download the admit card of NEET, candidates will require the registration number generated at the time of filling the application form and their date of birth. In case a candidate loses or forgets his/her registration number, they can access it from their registered email-ids or mobile numbers entered at the time of filling the application form.

you can easily get your registration number if you find your admit card or get the message/email that was provided to you.

hope that helps