JEE mains was exepecres to be conducted in April 5,7,8,9 and 11 which is postponed due to COVID-19 because india is lockdown till 15 april.No new dates has been released yet.
KCET is scheduled to be on April 22 and whether it will take place or be extended depends on the situation after april 15 and further announcement.
NEET is scheduled to take place on May 3 and will take place if everything will be fine by then.
I hope this helps
Here is the exam date for the following entrance exam-
NEET-UG 2020- 3 may 2020
Karnataka CET 2020- 22-23 April 2020
JEE- Main 2020- The exam has been resheduled and date has not been fixed. It will be conducted very soon after controlling coronavirus in India.
Hope it helps