Hi Manikanta,
Yes you are eligible for fee reimbursement. Can't say about full but it depends on government rules on particular category. You can apply as a fresh Candidate as soon as the registration begins. You need to have a category proof if applicable, and most important income certificate.
Best of luck
Candidates can check B.Tech Cut off for Top IITs & NITs here.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile