Hello Usman,

• Roll Number is mentioned in JEE Main Admit Card .
• If the admit card is not available, download it again from /nta.ac.in OR jeemain.nic.in 2019 by using Application Number and Password.
• In case, the application number is not accessible then check the email that was sent on registered email while applying for JEE Main 2019 through JEE Main login .
• If the application number and password are lost then retrieve them using Forgot Password/ Forgot Application Number at jeemain.nic.in. 2019 session.

Thank you ,Best of luck