Hello aspirant

If you will get 680 marks in Neet 2024 then you will have great win .

680 marks are so good . You must get a mbbs seat in government college in Tamil Nadu but which college you will get can't be predicted now. It depends upon cut off neet and  cut off neet changes every year abd is dependent upon number of factors such as how many  students appeared in Neet, difficulty level of exam, seat intake , previous year's cut off etc .

Now looking at previous year's cut off trends you must get following colleges in Tamil nadu with your expected score

Christian medical college , vellore

Stanely medical college,  Chennai

Madras government medical college,  Madras

Aiims madurai,  madurai

Coimbatore medical college , Coimbatore

ESI PGIMSR,  Chennai

For rank prediction you may follow the link given below

https://medicine.careers360.com/neet-rank-predictor

For college prediction following link may help you

https://medicine.careers360.com/neet-college-predictor