With your 126 marks in JEE Mains,

Your Percentile based on category is: 99.39 - 99.59

Your Overall Percentile is: 97.82 - 98.02

Your Rank based on category is: 298 - 1348

Your Predicted Rank is: 18089 - 20239.

You have very good chances of getting seat in top NIT's.

To know your admission chances in JOSSA & State counseling you can use JEE Main college Predictor tool.

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Thank you