According to the 2021 WBJEE cutoff, the required cutoff for CSE at Heritage Institute of Technology is 3434 (general). So, it will be difficult to get admission in CSE with your rank. As an alternative, you can go for IT at Heritage. It offers similar career prospects as the CSE branch. 

With 4.5k rank, you can also try for KGEC EE/JGEC CSE/GCECT CSE/GCELT CSE/IEM IT/ GCETTS CSE.

At this rank in case, if you are getting a Govt. college don’t go for it as there is a very low chance of placements.