You need to submit your caste certificate to the college admin during adminstration. It will only be given to you if you leave their seat or when you pass after 5.5 years !

Hi dear,

           You need to submit the certificate of Scheduled tribe only during the time of admission ie. When you actually locked your seat and called for the admission you have to go to the college with all your documents. They will ask you for your caste certificate and you have to show the authorities at that time.

You don't need any category certificate during counselling because it is online process just you have to mention your category during counselling.

All the best