Hello Prachi, it doesn't matter how many marks you score in your board exams until you score above 75% which is the criteria to qualify for JEE advanced. With 68 percentile in JEE mains you must be having a rank near about 3,00,000. That means you have not qualified for JEE advanced. It also unlikely that you may get any NITs with this rank. I suggest that you apply for your state engineering colleges where you stand a chance of getting a good college even on basis of your JEE main score. Best of luck for your future Prachi.