Greetings!

Since, you've not mentioned the category, we've assume it to be for general category. The cutoff for 2020 for is not yet declared by the authorities concerned, but the cutoff score for last year for general category was 701-134, so yes you may have a chance to get BDS.

Click on the link below to get a list of medical colleges in Tamil Nadu for BDS:

https://medicine.careers360.com/colleges/list-of-bds-colleges-in-tamil-nadu

You may check the link below, for more information:

https://medicine.careers360.com/articles/neet-cut-off

You may check your rank, with the expected score on the link below:

https://medicine.careers360.com/neet-rank-predictor?icn=NEET_rp&ici=NEET_question_detail

You may find colleges here:

https://medicine.careers360.com/neet-all-india-college-predictor?

You might also check the link below to find other colleges that are accepting UG admissions on the basis of the NEET score:

https://medicine.careers360.com/colleges/list-of-medical-colleges-in-india-accepting-neet

Hope this helped, good luck!