Hello Praveen,

The previous year cutoff in Tamilnadu for SC are in between 440 to 480 among the different colleges. So, if you want to safe score to secure a government college for MBBS in Tamilnadu then you have to score 490 to 530 marks in NEET exam. In order to achieve this goal  you should read NCERT books of Physics, Chemistry & Biology of class 11th & 12th at least 5 times. You should also try to solve the previous years question papers again and again, and start giving mock test.

For more information you may visit the link given below

https://medicine.careers360.com/articles/neet-cutoff-tamil-nadu

All the best