For online counselling, first you need to get registered in the respective website with your details and pay the nominal fee to enter into counselling. They will announce the date of commencement of counselling and seat allotment date. Based upon your rank, interested branch and college, you need to keep options in a chronological order. We need to be very careful in keeping options as they allot seat based upon your first preference. You can also check closing ranks and seat allotments in respective colleges from careers360 website