i got 128 marks in jee main on 9th april 2019. what would be my nta score under genral cateogary?shall i get any nit??

Hi Pragya, your NTA score cannot be predicted on the basis of your marks as your NTA scores will be released after normalisation of your marks which means that NTA will consider various factors such as the difficulty level of your paper as compared to others while calculating your percentile, for example, a student who has scored less marks than you may have a higher percentile than yours because his or her paper was more difficult than yours. So I would suggest you to wait for the announcement of official result. If you want to check the colleges that you can get with your score you can use the following college predictor-

https://engineering.careers360.com/jee-main-college-predictor
if you want any other information about how your percentile will be calculated or about the normalisation procedure you can check out the following link-
https://engineering.careers360.com/articles/jee-main-normalisation-process-how-scores-are-calculated
All the best!