Find your TAN or company name with Income Tax Department using this online service. You can select the category of deductor, state, company name or TAN and get details such as PAN, status, etc. Track your TAN application status As per RBI guidelines, the entities making e-commerce transactions are required to provide PIN (Personal Identification Number ) while executing an online transaction. TAN is a 10 digit alpha numeric number required by persons who deduct or collect tax at source. Learn how to apply for TAN , why it is necessary, and how to verify it from the Income Tax Department website.