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CBDT Circular 04/2026 on Document Identification Number (DIN)


CBDT Circular 04/2026 prescribes revised rules for mandatory Document Identification Number (DIN) in notices, letters, orders and tax communications.


Introduction

The Central Board of Direct Taxes (CBDT) has issued Circular 04/2026 to prescribe revised guidelines regarding mandatory quoting of Document Identification Number (DIN) in income-tax communications.

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