A Tax Deduction and Collection Account Number (TAN) is a 10 digit alphanumeric number issued to persons who are required to deduct or collect tax on payments made by them under the Indian Income Tax Act, 1961. Every assesse liable to deduct TDS is required to apply for a TAN No. and shall quote this number in all TDS returns, TDS payments and all other communications regarding TDS with Income Tax Department. To obtain TAN, application must be made for allotment of TAN in Form 49B along with the required supporting documents. Based on the application, the TAN will be allotted to the entity and the entity must quote the TAN in all TDS/TCS returns, TDS/TCS payment challans and all TDS/TCS Certificates.