Hi

You have not mentioned the category you belong to so I am  assuming  you from general category if you belong to any other category then do let me know in comment .

In neet 2019, 461 marks was the lowest marks that was required for general category for getting  mbbs seat  in a government medical college under   under Karnataka 85% State quota and it was for Bowring and Lady Curzon Medical College and Research Institute, Bengaluru

But 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 target at least 500 marks in your neet 2020 examination  to be on the safer side

Thank you