Dear Anamika,

In order to take admission in DTU you have to appear in JEE Main exam and counselling will be held through JAC Delhi. 

The admission authorities of JAC Delhi will be releasing JAC Delhi 2018 application form tentatively in the second week of June 2018.

You can apply online for the application form you don't need to go anywhere. 

To know in detail you can refer below link

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

Good Luck!!