Mbbs admission through management quota is only possible in private and deemed medical college. Not in a government college.  As there are around 78,000 seats and the total number of applicants is around 13 lakhs. The total number of eligible students every year is around 6 lakhs. As you can see from the above stats the medical seats are very less and demand is very high. There are around 5000 mbbs seats (govt and private ) with around 1600 seats in private medicalcolleges out of which 45% seats would be for management quota so I would say your chances of getting a seat even with management quota is not much however as far as i know if your name is not there it is possible that your name might be there in the second round if enough seats are left vacant so dont give up.  The official websites of the DME are www.tnhealth.org and www.tnmedicalselection.org please visit thisfor more information. All the best.