Yes,you can.The eligibility criteria for JEE Main is simple.

•The minimum academic qualification for appearing in JEE (Main) is that the candidate must have passed in final examination of 10+2 (Class 12).Those appearing in 10+2 (Class 12) final examination may also appear in JEE (Main).

•There is no age limit for the candidates.Date of Birth should be as on Class 10 Certificate.

•A candidate must be an Indian Citizen. NRIs, PIOs, OCIs & Foreign national candidates can also apply.

•The candidates can apply for JEE Main exam only for 3 times. Aadhaar Card is very important to apply for this exam

To sit for the examination,a student should have complete knowledge on Physics,Chemistry and Mathematics.The syllabus of these three subjects is basically taught in classes 11 and 12.So preparation on these subjects during your (10+2) is mandatory.