As per this latest article from Times of India, counselling will start from 20th June 2018. Here's a link to the article for your reference:

https://timesofindia.indiatimes.com/city/hyderabad/mbbs-bds-counselling-in-telangana-likely-from-june-20/articleshow/64619966.cms

You can check the KNRUHS website for more details/notifications about the counselling: www.knruhs.in

Good Luck!