The Indian direct tax landscape is undergoing its most significant transformation in decades as the Income-tax Act, 2025, prepares to replace the veteran 1961 Act effective April 1, 2026. For individuals in business or profession, understanding the shifting requirements for a tax audit—moving from the familiar Section 44AB to the new Section 63—is critical for staying compliant.

Here is a guide to everything you need to know about tax audit applicability, new forms, and transition procedures.

1.Do You Even Need a Tax Audit?

This depends on what you do and how you collect money.

For Business Owners:

• The ₹1 Crore Rule: If your total sales or receipts cross ₹1 crore, you need an audit.
• The Digital Incentive: If your cash receipts and payments both do not exceed 5% of your total transactions, the audit threshold is significantly higher at ₹10 crore.
• For Professionals (Doctors, Lawyers, Architects, etc.): Mandatory if your gross receipts from the profession exceed ₹50 lakhs during the tax year.

Presumptive Taxation Cases:

• If you choose to declare income lower than the presumptive rates e.g., 50% for professionals under Section 44ADA (Old Act) / Section 63 (New Act) and your total income exceeds the basic exemption limit, an audit is mandatory to verify your lower profit claims.

2.The Transition: AY 2026-27 vs. Tax Year 2026-27

The most confusing part of the next two years will be managing two different sets of laws simultaneously.

3.The Big Change: Introducing Form No. 26

Under the Income-tax Act, 2025, the Department has streamlined the reporting process. For Tax Year 2026-27 onwards, the three separate forms (3CA, 3CB, and 3CD) are merged into a Single Unified Form 26.

Key Features of Form 26:

• Rationalized Disclosures: Audit clauses are now aligned directly with the ITR framework for better consistency.
• Simplified Expenditure Reporting: Instead of item-wise reporting for every disallowance, the new form uses a streamlined consolidated disclosure.
• Enhanced Transparency: New dedicated schedules for Depreciation, Losses, and Computation of Expenses have been added.

4.Compliance Procedures

To complete a tax audit, individuals must follow these steps:

• Appoint an "Chartered Accountant": The audit must be performed by a Chartered Accountant as defined under the Act. The auditor must ensure they are not within prohibited categories, such as being a relative or having a substantial debt to the assessee.
• UDIN Generation: The auditor must generate a Unique Document Identification Number (UDIN) for the report to be valid.
• E-Filing & Acceptance: The auditor uploads the report to the e-filing portal. However, the filing is not complete until the assessee logs in and accepts the report. Individuals and HUFs can now verify these forms using an Electronic Verification Code (EVC) or a Digital Signature Certificate (DSC).

5.What Happens If You Miss the Deadline?

Failure to furnish the audit report on time can be costly.

• Under the 1961 Act: A penalty of 0.5% of turnover or ₹1,50,000 (whichever is less) may be levied.
• Under the 2025 Act: A new "fee for default" is introduced—₹75,000 for a delay of up to one month, and ₹1,50,000 if the delay exceeds one month

6. Summary of Audit Limits

The thresholds are identical under both Section 44AB (old Act, 1961) and Section 63 (new Income Tax Act, 2025).