Hello Aspirant,

Yes definitely you can appear for JEE-Main 2023 even if you have not scored 75% marks in class 12th this is because there is never a requirement of any minimum percentage in class 12th for JEE-Main but the 75%  is required for admission to NITs/IIIT/GFTIs on the basis of your JEE-Main score or to appear for JEE-Advance.

But you can get admission in other colleges to by only appearing in JEE-Main depending upon the eligibility criteria.

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!!