Government Medical Colleges do not have Management Quota. And there are 3 Categories in Private Medical Colleges. Category A is the Government Quota Seats. And only candidates of the home State are eligible to apply for these seats. B Category seats are also called Management Quota Seats and they are filled through  State Counselling and the remaining seats are filled by direct Admissions by contacting the College directly. Here the fees is usually nothing less than 40 lakhs. The last Category is NRI seats Category and you cannot apply for that. The ratio of distribution of these seats in Private Medical Colleges is 40:50:10. So there are only 50% of the seats that are available for Management Quota in Private Medical Colleges and even they are filled under State Counselling. The remaining seats are filled through Direct admission. So if you belong to General Category and want to try under Management Quota, you should aim for nothing less than 450-475. This is because in 2019 alone, the cut offs in Tamilnadu Medical Colleges increased by 100 marks.