Hello Sir,

 It depends upon your category. If you are from general category , your son won't get any NIT in 142 marks. In case you are OBC, then you have to wait for the cutoff marks to get reveled. 

You can check further more details about previous year's NIT cutoff in below mentioned career 360 link

https://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-main-cutoff-for-top-nits%3famp

Other factors also matters like 12th pcm aggregate,etc.If your son gets aggregate of around 85% and you are from obc,sc,or st then he may have a chance to get admission in nits.

I hope this may solve your problem.I am always happy to help you.Ask if you have any further queries.Thank you

• https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-rank-predictor/amp

• https://engineering.careers360.com/jee-main-college-predictor

• https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff-for-top-nits/amp