Hello 

As you mentioned, your daughter has scored 300 marks in NEET, sc quota but didn't specify whether she has state quota or all India quota; so I'll consider both the scenarios.

Under All India Quota, it will be tough to get admission but under state quota, you have chances to get a medical seat in government medical colleges. The list of colleges with their last year's cutoff is mentioned in the link below-

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

I hope this information proves helpful to you.

All The Best