Hi Ravi , for the counselling round candidate should have to bring the following documents

Admit card of the exam you appeared. i.e gate or jee main or jee advance admit card 

Rank card of the exam you appeared. i.e gate or jee main or jee advance Rank card

12 th marksheet 

12 th passing certificate 

Birth certificate

Category certificate

Counselling letter

Income certificate

I hope it will help.

Thanks.