after qualifying for the jee advance exam,to attend the iit counselling do we get any letter from the regional iit or we need to regiter?and if we need to register,whereshould we register?

Dear Student, you can get this information by visiting the official website of JEE advanced, there you may get the merit list, cuoff and schedule of counselling rounds and accordingly the allocation of a branch as per the availability. If you did well and got the chance there, well and good, otherwise, go for some other renowned institutions like – CMR Technical Campus, Hyderabad,........................College of Engineering, Trivandrum,.......................Lovely Professional University, Phagwara