Yes, you must register separately for IPU CET counselling to get admission in BBA at IITM Delhi. After your IPU CET results, visit the official IPU counselling website and register there. You will fill in your college choices, and seats will be allotted based on your rank and preferences. After seat allotment, you must pay the fee to confirm your admission. Without counselling registration and fee payment, you won’t get a seat.