Hi

You have not mentioned your state of domicile and category dear , do let us know it so that I can help you in a better way

Nevertheless,
just to give you an example, if I tell you about west bengal then,
in neet 2019, then 497 marks was the lowest marks for general category for bds seat in government dental college under state west bengal quota and it was for NORTH BENGAL DENTAL COLLEGE


Now,
cut off marks keeps changing every year depending upon various factors like number of students that appeared in the exam, kind of marks obtained by them , toughness level of the examination etc

So, you should try to get at least 500-550 marks for bds to be on the safer side in your neet examination if you want to get a seat in government college


Thank you