Dear Hema,  your NEET score has little to do with a management quota seat. If you get good NEET score, then you are eligible for counselling. Most Private colleges will be ready to give you seat under Management quota. In NEET 2018, the cut off for PSG Coimbatore for general category was 50% and for OBC/SC/ST was 40%. However if you insist on a management quota seat with good NEET score, I would suggest you to reach out to the authorities at psgmedschool@gmail.com for fees structure, etc.