ICAI Introduces UDIN Ceiling & Field-Level Validation for Section 44AB Tax Audits from 1st April 2026



Quick Summary
The Institute of Chartered Accountants of India (ICAI) has announced new regulations for Unique Document Identification Numbers (UDINs) related to tax audits under Section 44AB. From 1st April 2026, a limit of 60 tax audits per chartered accountant will be imposed for UDIN generation under the 'GST and Tax Audit' category. Additionally, field-level validation is now active on the UDIN portal for all sub-categories within Section 44AB.

The Institute of Chartered Accountants of India (ICAI) has announced the implementation of field-level validation for all sub-categories under Section 44AB at the time of UDIN generation under the 'GST and Tax Audit' category. The announcement, issued by the UDIN Directorate follows the decision taken by the ICAI Council at its 442nd meeting held on May 26-27, 2025. Official copy of the notification is as follows Field-Level Validation for all sub-categories under section 44AB [Clauses (a)
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FAQ :

The ICAI is implementing a ceiling on the number of UDINs that can be generated for tax audits and introducing field-level validation for these audits.

Both the UDIN ceiling and the field-level validation will be effective from 1st April 2026.

The maximum number of tax audits for which a UDIN can be generated is 60.

The changes affect Forms 3CA and 3CB under Section 44AB, specifically clauses (a) to (e).

Yes, field-level validation has already been implemented on the UDIN portal.




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Finance news reporter covering taxation, GST, income tax, business compliance, and economy updates. I simplify complex financial topics into easy-to-understand articles for professionals, taxpayers, and business owners on leading finance and tax platforms.

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