Hii,

JEE (Main) will also be an eligibility test for the JEE (Advanced), which the candidate has to take if he/she is aspiring for admission to the undergraduate programs offered by the Indian Institute of Technology (IITs).

You can give 3 attempt in jee mains..

In the JEE Main , every student is allowed a total of three attempts.

NTA in the official brochure invited applications from students who have cleared class 12 in 2018, 2019 and appearing in 2020.

For more information about the elegibility criteria please check out the link mentioned below

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

Hope this will help you,

All the very best!!