Hi

First you need to apply for BITSAT 2019 online mode. Here is the link

http://www.bitsadmission.com/bitsatmain.aspx     apply online.

The last for application is 20 march 2019.

You will be download admit card only after slot booking.

Slot booking starts from March 28 to april 8 2109.

Admit card will be released on april 12 2109

for more information please go through the below link

https://engineering.careers360.com/articles/bitsat-admit-card