Hey Shubham,

After selection of WBJEE you need to report to the nearest reporting center of wbjee. The reporting centers are mentioned on their official website and the time is also allotted there. 

After that, you need to exit the counseling round by reporting to that center and confirm your admission to that college.

Then you need to visit the college that you have chosen and I advise you to contact to the admission cell before visiting the college and ask about the process of admission and documents you need to carry with you for the admission and then visit the college.  

For furthur more details visit https://www.careers360.com/exams/wbjee

Hope that helps

all the best

The college allotted to you during the time of counseling.