Hello student, 

The counselling is being conducted offline but, yes, you have to fill a counselling form by logging in through your credentials. after that you have to pay a tuition fee which will allow you to fill the choices for your selective fields. You will be called according to your rank and a number of procedures are going to be held:-

Https://engineering.careers360.com/articles/comedk-uget-counselling

You can go through this link, if you have any further queries you can ask them in the comments section below.

Cheers!