Hello Aspirant,

See your eligibility is considered from the year in which you appear for class 12th examination for very first time so your eligibility period will start from 2024 only if you are going to pass your class 12th examinations in 2024 then you will be eligible for JEE-Main 2024, 2025 and 2026 and for JEE-Advance 2024 and 2025 provided that you qualify JEE-Main 2024 and 2025 respectively.

This is because maximum attempts allowed for JEE-Advance is 2 in 2 consecutive years, first attempt in the passing year of class 12th or equivalent examination and second attempt in very next year to that. Similarly for JEE-Main maximum attempts allowed for JEE-Main is 3 in 3 consecutive years, first attempt in the passing year of class 12th or equivalent examination and second attempt in very next year to that followed by third attempt in third year.

For more details kindly check out the links given below :-

JEE Advanced Eligibility Criteria 2022 - Check Age Limit, Domicile, Average Marks (careers360.com)

JEE Main Eligibility Criteria 2022 (Released) - Check Age Limit, Qualifying Marks, Number of Attempts (careers360.com)

I hope this information helps you.

Good Luck!!