Hello there,
With 18000 rank, it's a little difficult to get Government Colleges for CSE. But you will definitely the other branches at this rank. All the cut-off ranks for Govt colleges mostly close at 16000. Nevertheless, you should sit for counseling, and wait till the last round. Cut-off ranks change every year depending on the difficulty of the paper, and the number of students appearing for it. So, maybe you can get a chance.

You can check the link given below to know more about the government colleges accepting WBJEE:
https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-india?state=West%20Bengal&ownership=Public/Government&degree=B.E%20/B.Tech&branch=Computer%20Science%20Engineering&exam=WBJEE

Hope this answer helps you.
Good luck!!

Yes you can. ...    ...............................

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