Dear Aspirant,

Cut off percentile for General category candidates is 50 while for OBC, SC, and ST category candidates the cut off percentile in 40. 

It is difficult to get admission in the government colleges , but you can get admission is some of the private colleges.

Check the link below for the detailed list of all govt. and private colleges according to the marks obtained.

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

Hope this helps.

Good luck