Hello Gautam!

Those IIITs which participate in JOSAA seat allocation process don't require separate application forms but for the IIITs established by respective state governments like IIIT Delhi, IIIT Bhubaneswar, IIIT Hyderabad, IIIT Bangalore and some others.

Punjab Engineering College, Chandigarh participates in Joint Admission Counselling process of Chandigarh, held usually on the first week of June every year. So, for this, you will have to register yourself online by visiting official website of this college if you get selected.

Hope this answer will help you.