Know TAN Details FAQ 1. What is TAN ? TAN stands for Tax Deduction and Collection Account Number . It is a 10-digit alpha-numeric number issued by the ITD. 2. Who needs to obtain TAN ? TAN must be obtained by all persons responsible for deducting tax at source or who are required to collect tax at source. What is TAN ? TAN or Tax Deduction and Collection Account Number is a unique ten-digit alpha-numeric number required to be obtained by all persons who are responsible for deducting or collecting tax. 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. What Is TAN number ? TAN number refers to Tax Deduction and Collection Account Number which is issued by the Income Tax Department.