Hi there,

Congratulations on getting a seat in the nit in this year.

Yes you can certainly drop out of your current college as a dropper and then take the admission in the alloted nits or any government institutions.

Yes the college will allow you to do so without providing any hindrance to it.

To get the required tc from the college, you have to apply from it by filling a form and then contacting the required officials to do the needful.

You may have to contact your head of department or the dean of the students to give you the required and necessary documents for getting  the admission in the alloted college. You can refer to your college  website and then check the required details necessary to take the cancellation of the admission from the college.

Hope this resolves your query.