you have to fill application in online and march 31 st is the last date to fill BITSAT application.
hope it will help
The last date for application form for BITSAT 2019 is extended to March 31st 2019.
The application form is to be filled in Online Mode.
The exam will be conducted from May 16-26 in Online Mode.
Hope this helps you.
Please do tell in case you have any further queries.