NTA does not have any age criteria for candidates appearing for JEE Mains exam.  Student can sit for JEE Mains for three consecutive years from passing their 12th standard. If a student will pass his/her class 12 in 2021, he/she can appear in JEE Mains in the year 2021, 2022, 2023. but there is no upper age limit for appearing for the exam. in 2021 students can appear for the exam four times in february, march, april and in may

for more information check :

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

Dear aspirant,

Jee mains exam can be given by any candidate in any year but it would be just for a trial but officially as you have mentioned that you are in 11th std so you can give jee mains officially in the year 2022.

There are some eligibility criteria of jee mains which are as follows:-

1-Candidates must have passed their 12th or qualifying examination from any recognised board or university with mathematics and physics as compulsory subjects.

2-Candidates should also have scored 75% in their qualifying examination but this criteria has been removed in this year due to the pandemic situation.

For more information you can check out the link given below:-

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