GOVERNMENT OF WEST BENGAL e-FACILITATION CENTER, VAT, CST and PTAX. DK Banerjee and Co a legal firm of commercial law was by Mr. Deb Kumar Banerjee, Advocate in the year 1977 in Kolkata, West Bengal India. After a long journey of 39 years now the firm is serving with different branches of commercial law in India and abroad with his other partner Mr. Anikesh Banerjee, Advocate. Tax compliance and representation before tax authorities. Filing of Appeals and representation before Appellate Authorities.