What is the exact amount of money (donation) needed to get in CSE at Heritage Institute of Technology through the management quota?

The amount keeps changing every year. There is no fixed amount.

Nowadays, the college follows a system of seat-booking whereby you can book a seat if you are not quite sure about your admission to any college. You will have to pay a certain amount specified by the college and your seat will be booked in the stream that you want to opt for if you join the college.

The system is a little different and it is not exactly like the management quota in other colleges. The amount that you have to pay depends on which branch you want to opt for. The more demanding the branch, the more the amount of donation. For example, branches like Computer Science or Electronics are charged more than branches like Applied Instrumentation or Biotechnology.

I would recommend you book a seat and later decide whether you want to join or not. This will cost you less. But, you will have to decide within a short span of time otherwise the authority will move the list and give admission to a lower-ranked individual.