Hello Pradeep 

The cut off marks changes every year depending on the number of seats, difficulty of paper, number of students etc. The minimum marks required depends on category and for general category you should score minimum 500+ for mbbs and 480+ for bds to be in safer side. 

To know neet cutoff for karnatka use the link below 

https://www.google.com/amp/s/medicine.careers360.com/articles/neet-cutoff-karnataka/amp

Hope it helps you