We have changed our Regd office address (from Ekkattuthangal, Chennai - 97 to Guindy, Chennai - 32 ). Works address is same. Kindly advise me how we should intimate it to the following authorities? any prescribed format? Range / Circle will change? 1) Sales Tax Dept 2) Excise Dept 3) Service Tax Dept 4) ESI 5) EPF Pls help me....