hello aspirant,

Your state caste certificate will be accepted if you wrote a state level examination,as jeemains is national level examination you need to have obc certificate,if you dont have that you will be considered under general category and the you cannot have reservation.there is still time to write jee exam you need the obc certifcate during counselling..so till then you can apply and you will easily avail obc certificate till then..and dont lose the advantage of reservation apply to obc certificate as soon as possible.

hope this helps,

thankyou.