Hello Madhumitha,

Sorry to say but you will not be able to get a  seat in good government medical college as the cutoffs of Tamil Nadu colleges are very high enough. If you have state quota of Tamil Nadu then you need to score above 600 and in All India Rank you need to score above 550 to get a college.

You can check previous years cutoffs in this site:

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

Hope it helps you

Thank you