1. Trade license is issued by Municipality. so, you shall have to apply for the trade license of the branch office from kolkata Corporation/salt Lake municipality duly mentioning therein that you are the branch office of the firm formed at Murshidabad,
2. Yu need to have permission to open an office in residential area of salt lake,
3. If you use a property for commercial use, you shall have to pay for the electricity and water connection at commercial rate.