Hey Pradeep !
In 2018, the NEET results were declared on 4th June' 2018 and accordingly the registration for the counselling in the Deemed Universities started right from 13th June' 2018.

If everything goes as per the schedule this year too without any unnecessary delay, then we would have the result out by 6th June'2019 and hence there's a possibility that the deemed universities might begin the registration process for the Counseling Procedure near about 15th June' 2019.

Hope this helps.

All the Best !