Document Identification Number



Documents without DIN shall be treated as invalid.

Document Identification Number (DIN) is a unique number which is mandatory for every tax payer to communicate with the income tax (IT) department of India.

In the Finance Act, 2010, a new Section 282B was inserted for the allotment of DIN.

The I-T department will allot DIN on each incoming or outgoing communication so that no one can deny its existence. However, the I-T department needs to have the requisite infrastructure and facilities in place before it can cover the gamut of services mentioned in Section 282B on a pan-India basis.

Uses of DIN Number

  1. Notice to IT Department
  2. Order to IT Department
  3. letter to IT Department
  4. Claiming Refunds
  5. Tax-related correspondence
  6. Error-Free Filing of Income Tax Returns

How to Obtain a DIN number ?

The number will be issued IT department & the Aayakar Sampark Kendras.


The law will help in bringing more transparency in tax administration as the whole exercise involves a number of documents and proformas.

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