Hey,

Here is the info about BITSAT 2018 Slot Booking – Important Dates

• Slots will be offered on a first-come, first-served basis. So, to get a slot of choice, the candidate must participate in BITSAT slot booking 2018 early.
• The candidate will only a couple of minutes within which they have to book a slot for BITSAT 2018
• In case of candidates who don’t participate on BITSAT 2018 slot, they will be offered slots by the institute. 
• The BITSAT 2018 hall ticket will be available post successful slot booking.

To successfully complete the BITSAT 2018 slot booking process (STEP BY STEP explained), the candidate needs to VISIT: https://engineering.careers360.com/articles/bitsat-slot-booking

• Access BITSAT official page & click on the link provided for slot booking
• Select your test center which has already been allotted.
• After selecting the center, a new date window is displayed. Choose a Date
• Proceed ahead to slot selection, after confirming the date.
• Two time slots will be available vis-a-vis 9 AM  12 Noon & 2 PM to 5 PM. Choose your preferred time slot. If you have strict preferences you should do the slot booking as early as possible.
• Confirm your Booking & Youre Done
• All the best.

I would advice you to see this link: https://engineering.careers360.com/articles/bitsat-slot-booking. 

Basically, you are first required to login to the BITSAT portal. After successful login, you can select an exam centre from the drop down menu according to your choice. Note that this is an irreversible process. So, choose carefully! 

After the selection of the exam centre, you can then choose the exam date at which you feel will be most comfortable. Sometimes, the dates may come close to JEE Advanced. So, again choose carefully. The process is finished!