Hello Madam/Sir,

JEE Main April session and May session have been postponed due to the corona pandemic in the country. The registrations for JEE Main April session was already closed but the registration for JEE Main May session haven't started. The registrations will be opened for May session when the dates are re-scheduled. Your son can apply for JEE Main May session. So until the dates re -scheduled you have to wait. Please keep an eye on the updates from time to time. To check the new dates and updates you can use the link below

https://engineering.careers360.com/articles/jee-main-application-form

The re-scheduled dates will be updated as soon there is an official announcement regarding the re-scheduled dates by the concerned authorities.