Hello sir, for getting your ward admitted in DTU/NSIT you need to fill up the form of JAC which will be released in the third week of June. Only after filling the form will the colleges select your ward for the counselling process if he/she has scored the cutoff rank.

If you come from the Delhi region then it will be easier to get selected for the counselling process as the cutoff ranks are not too high for the Delhi region. But if you are from Outside Delhi then the cutoffs range from around 1,400-10,000. 

For more details about JAC you can check out the following link-

https://engineering.careers360.com/articles/jac-delhi-application-form

I hope this would have helped you.