Hello Aspirant,

See you will be eligible for JEE-Main even if you have not scored 75% or greater marks

BUT

for admission to NITs/IIITs/GFTIs through JOSAA counselling or to appear in JEE-Advance you need to have at least 75% marks in class 12th if you belongs to General category but this percentage criteria is being waived off since the pandemic started and is also relaxed for this year but for next year if this criteria gets restored then you will become ineligible. But if it does not get restored then you will be eligible.

Also note that 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!!