sir I am appearing of 12th tamilnadu board I can write all four sessions of jee main 2021
Hello,
The registration date for the February attempt is already over. Now National Testing Agency (NTA) will open the registration portal for each of the three session for a short duration. Make sure that you fill up the form during that time and appear for the three sessions since To compute the All India Rank in the JEE Main exam, the best of the four NTA JEE Main 2021 scores will be taken.
For more information please refer to the link:
https://engineering.careers360.com/exams/jee-main
Good luck




