Hello Savita,

BTech admissions usually are conducted through the various counseling procedures that the University or some Institute provides you with.
You can apply online.
Kindly provide us with the name of colleges you are interested in as it is not mentioned in your question.
So that we can give you exact details of the admission procedure.
You can also give us details about your scores in entrance exams for more precise information.

I have attached a link to the list of engineering colleges which are open for applications right now, the link will also direct you to their application portal:-
https://dqxeclau.top/application-forms/colleges?domain=engineering-and-architecture&courselevel=ug&location=

Hope this helps :)
Best of luck!