No, your Rajasthan-issued OBC NCL certificate may not be valid for JEE counselling. For JEE, you need a central OBC NCL certificate, not a state one. While you're from Rajasthan, the caste must be listed on the central government's updated list of OBCs to be eligible for the reservation benefits. You should obtain a central OBC NCL certificate, that should be issued on or after April 1, 2024, and make sure it follows the specified format.