Hello aspirant!  Let me to inform you that if you have selected a college in round one of counseling and you want to change it in the second round then you can change it in the second round counseling. In that case you can get your fees of the college refunded but if you don't want any college and you want to leave that seat after selection then you won't get refunded . You can check the details here :

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.comedk.org/wp-content/uploads/2019/06/COUNSELLING-PROCESS-DOC-pdf-F-15-JUNE.pdf&ved=2ahUKEwiB4-PjmqXjAhXHOY8KHdWHAQIQFjAAegQIBRAC&usg=AOvVaw1gKVV9Z4L4Kf6hVclV3bGv