You can give exams by ways many students give, but it wont be applicable for admission. As per your question you are promoted to 12 this year i.e., you will go for 10+2 in 2022. Thus you are eligible for JEE MAINS in 2022. You can't attempt JEE MAINS 2021.

Now if you want then you can obviously practice this year question paper and self test yourself this will benefit your preparation.

To know more about JEE MAINS preparation visit the link below:

https://engineering.careers360.com/articles/jee-main-preparation-tips

For JEE MAINS more details visit the link below:

https://engineering.careers360.com/articles/jee-main-2022

I hope this answer helps. All the very best for your future endeavors!

Hi

No, you are not eligible for JEE mains 2021 if you are still studying in class 12th means you will be appearing for your class 12th board examination in 2022 and thus you will become eligible for JEE main  2022.

For your reference,

Jee main eligibility criteria is given below-

-) Qualification required :- to be eligible  for JEE mains  for BE or Btech you need 10+2/equivalent qualification with Physics,  mathematics as compulsory subject along with anyone of Chemistry or Biology or Biotechnology or Technical Vocational Subject.

-) Passing year :- one is eligible for JEE main examination for consecutive three years starting from the year of passing for 12th /equivalent examination i. e to be eligible  for JEE mains 2021 you should be either appearing for 12th board exam or equivalent  in 2021 or should have passed it in 2020 or 2019

-) There is no age limit to be eligible

-) there is no minimum percentage requirement to be eligible for JEE Main.

But yes,

To be eligible for NITs, IIITs, CFTIs one needs at least 75% marks in class 12th if belongs to General or OBC category  or at least 65% marks in class 12th if belongs to Sc or St category. For this year i. e 2021 this minimum percentage requirement of 75% - 65 % has been lifted off.

For detailed information about jee main eligibility criteria  go through our page, the link for which is provided below

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

Thankyou