Hello.

There is no longer an age limit for a student to attempt Jee. It depends on the year the candidate clears the class 12 exam. For eg, a student who cleared the board exam in 2017 will be eligible to write the Jee till 2020. So, a student can write the exam for 3 years after clearing the board exams. Refer this link for more information:

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

Good luck!