TAN application form issued by the NSDL and this form can be obtained from the official website of nsdl.co.in, or it can be directly downloaded from the link given at the bottom of this page. TAN is essential for all the assessees required to deduct TDS (Tax deducted at source) on transactions. If you are required to deduct TDS, obtaining a TAN is necessary. Fill out application Form 49B for allotment of TAN (Tax Deduction and Collection Account Number). Form 49B is an application form under section 203A of the Income Tax Act,
1961 for the assignment of a TAN number or TAN deduction and payment account number. For all entities eligible to subtract TDS on payments, TAN registration would be necessary. Download TAN Application Form PDF here.