Although there is no minimum cutoff to qualify for NIT you should score at least more than 94 above percentile in JEE Mains if you belong to a general category. To know about other caste cutoffs or some specific NIT cutoff in detail you can visit the below link. https://engineering.careers360.com/articles/jee-main-cutoff .

Or to predict the colleges that you can get with your score you can use the college predictor tool:- https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer