Hello Aspirant,

Unfortunately you will not be eligible for either JEE-Main or JEE-Advance because you have mentioned that you are 12th pass out of 2018 and as per the guidelines for JEE-Main, any candidate is eligible to appear for JEE-Main only for three consecutive years which includes the passing year of class 12th and if the candidate does not appear in any of the year then also he will not be allowed to sit further. So if you have passed your class 12th in 2018 then you were only eligible for JEE-Main 2018, 2019 and 2020 according to the current guidelines.

So now you cannot get admission to NITSs/IIITs/IITs through either JEE-Main or JEE-Advance but if you want to pursue B.Tech then you can go for some private colleges which have their own entrance test as well so you can appear for them, or most of the private institutions take direct admission as well on he basis of class 12th merit, so you can check it out also on the official website of the colleges.

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

https://engineering.careers360.com/articles/jee-main-number-of-attempts

I hope this information helps you.

Good Luck!!