Hello Aspirant,

See till now no notification has been released for JEE-Main 2023 so at this moment of time it is quite difficult to say whether the candidates scoring less than 75% in class 12th will be eligible or not for admission to NITs/IIITs, because the relaxation is only provided till current academic year and nothing is known for next year so kindly wait for it. However for JEE-Main you can appear even if the criteria gets restored because there is no requirement of any minimum percentage.

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!!