Hello student, 

The cut off marks for NEET in 2018 for general category was in the range of 550-570 marks 

The cut off marks for SC category was 420-450 marks.

The cut off marks for ST category was 400-430 marks.

These are the general range of cut off marks for all categories in 2018 for Tamil Nadu.

The cut off marks change every year due to the number of students appearing for the exam, difficulty level of the exam, etc. Therefore, the chances of admission will increase if you score higher score than the given cut off range. 

Good Luck.