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Apr 02, 2026
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CBDT issues new circular simplifying DIN referencing in income tax communications
The Central Board of Direct Taxes (CBDT) on Tuesday issued updated guidelines for referencing computer-generated Document Identification Numbers (DIN) in income-tax communications. It states that any correspondence such as notices, letters, orders, draft orders, or summons issued by income-tax authorities to taxpayers must reference a DIN. The circular also lists practical exceptions where DIN referencing may not be possible, including technical difficulties, field enquiries outside the office, or system unavailability. In such cases, the communication must explicitly state the reason and require post-facto approval within 15 days by a competent authority.
The concept of Document Identification Number in income-tax proceedings was introduced by the CBDT in 2019 to ensure transparency, accountability, and an audit trail in departmental communications. It mandated that every notice, order, summons, or letter issued by the Income-tax Department must carry a computer-generated DIN, failing which such communication would be treated as invalid or deemed never to have been issued, except in limited specified circumstances.
Various high courts interpreted the circular strictly and quashed several reassessment notices and orders purely on technical grounds. Taxpayers relied heavily on this as a jurisdictional defect, while the tax department argued that DIN was only a procedural requirement and that minor lapses such as non-mention or incorrect mention should not invalidate otherwise lawful proceedings.
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