Hey Nidhi.

The registration process for IMU CET will start in the  First week of April 2019. And the  Final date to fill and submit the application form of IMU CET 2019  will be in the Second week of May 2019. There is no provision for submission of late form or fees provided as of now. Hence it would be advisable to submit the form within the time period given. You can use the link below for any other details and updates.

https://www.google.com/amp/s/engineering.careers360.com/articles/imu-cet/amp

Best of luck