Hello aspirant, hope you are doing good.

So, to answer your question, Yes all the JEE mains and JEE advanced counseling for all the colleges will be done online this year. The steps to participate in the counseling :

Step-1: Registration - First the candidates had to register in the JoSAA web portal to participate in the JEE Main 2020 counselling and seat allotment process.

Step-2: Choice Filling & Locking - They have to lock their college preferences and B.Tech courses. The seats are allocated to the candidates on the basis of choices filled.

Step-3: Seat Allotment Process - Students will be allocated seats based on the availability of seats, preference & merit of the candidates. However, the mock allotment will be conducted by the exam authorities in two rounds before the actual seat allotment process.

Step-4: Fee Payment & Seat Acceptance - After the completion of the seat allotment process, they will have to select any one of the following options

You can go to the official site of JEE Mains and advance for more details :

https://josaa.nic.in/WebInfo/Page/Page?PageId=1&LangId=P

To read the entire article about JEE Mains counseling, you can check here:

https://engineering.careers360.com/articles/jee-main-counselling-seat-allotment

Hope this helps you. Good Luck !!