It is known that we can attempt a miximum 6 times in 3 consecutive years after passing the 12th boards. I will be passing the 12th boards in 2021, so that means, I can attempt for JEE mains for 2022,2023 and 2024? or 2021,2022 and 2023?

Hii

Here are the attempt you can give if you pass class 12 in 2021-

Jee main-2021, 2022,2023 only

Jee advanced- 2021, 2022.

Even if you miss any year, your chances will be missed and cannot aply later.

It's counted even if you will pass class 12 or not in 2021, but your chances are fixed as above.

Hope it helps

You can attempt it in 2021,2022 and 2023 if your 12th passing year in 2021.

Perhaps be positive 90% of focussed aspirants with proper preparation and strategy crack it within the second try ( Or Fourth Appearance as in NTA System, you can answer the JEE Mains Exam twice a Year).

All the best for all your future endeavours.