You haven't mentioned your Category. Nevertheless, KMC is a Deemed University. In 2018 under All India Counselling a score of 521 was the cut off for Mop Up round under General Category. That has been the cut off. Now this is 2018 data and cut offs change every year. Cut offs change every year depending on various factors such as no.of Candidates appearing for the exam, no.of Candidates qualified, top NEET score and difficulty of the exam. So for 2020, if you belong to General Category, you will  need atleast 550 and abovve and if you belong to Reserved Categories, you will need 500 atleast.