JBIMS has been following different process offately.
Since JBims has been deemed Autonomous and out of DTE Maharashtra, the fees have been hiked 300% and Admission process for 2018-20 batch have not been announced yet.
Probable exams to be accepted are:-

• CAT 2017 - already endes
• MAH CET 2018- registration ends on 2nd week Feb2018
• CMAT 2018 - To be Conducted in January 2018.

Hence , you should patiently await the Admission process.