/ Tax Audit Form Checklist · Updated 2026-10-22
Form 3CA/3CB/3CD Tax Audit India 2026 Complete Checklist, Section 44AB specific + Clause 44 reconciliation.
Form 3CA/3CB (auditor's audit report) + Form 3CD (particulars for 44 clauses) under Section 44AB Income Tax: due 31 October each year. Specific attention 2026: Clause 22 Section 43B(h) Year 2 (MSE payment), Clause 44 GST reconciliation. ICAI UDIN mandatory. Here's the complete 2026 tax audit checklist.
DC
Written by CA Durgesh Chavda
Chartered Accountant (ICAI) · Founder, Bharat Quantum Prospera · US incorporation, India-US DTAA, FEMA ODI, NRI taxation, cross-border structuring · LinkedIn
/ Section 44AB tax audit threshold
Who's in scope.
- Turnover above INR 1 crore (goods) / INR 50 lakh (profession) for AY 2026-27.
- Business with 95%+ digital receipts: INR 10 crore turnover threshold.
- Professional with 95%+ digital receipts: INR 75 lakh threshold.
- Section 44AD / 44ADA presumptive scheme + turnover below threshold = exempt.
- Due date: 31 October of AY (vs 31 July for non-audit). TP cases 30 November.
/ Form 3CA vs 3CB
Which applies.
- Form 3CA: for taxpayers who are required to get accounts audited under other law (Companies Act, LLP Act, etc.). Standard audit report + tax audit cross-references under same financial year.
- Form 3CB: for taxpayers audited only for tax audit (not under any other statute). Specific tax-audit-only report.
- Form 3CD: 44-clause particulars common to both 3CA + 3CB.
/ Clause 22 Section 43B(h) focus
The year-2 critical clause.
- Clause 22 expanded post Finance Act 2023 for Section 43B(h) MSE compliance.
- Current year disallowance: MSE expense paid beyond 45 days.
- Prior year reversal: MSE expense disallowed in prior year, paid during current year - allowed as deduction in current year.
- Udyam certificate collection + aging + Section 15 MSMED interest documentation.
- Cross-reference with MSME Form I half-yearly ROC filing.
/ Clause 44 GST reconciliation focus
The IT-GST interface.
- Clause 44 reconciles Income Tax turnover with GST turnover (GSTR-1 + GSTR-9).
- Common adjustments: credit notes / debit notes timing, exempt supplies, year-end sales returns, discounts, FX for exports.
- Narrative explanation for each unreconciled item.
- Feeds into GSTR-9 Reconciliation (31 December).
- ICAI 2024 guidance on Clause 44 methodology.
/ ICAI UDIN
The audit identifier.
- UDIN (Unique Document Identification Number) mandatory for every CA audit report + certificate.
- Generated on ICAI portal before signing + attached to Form 3CA/3CB.
- Verifies CA membership + prevents misuse of CA signature.
- UDIN check against ICAI records part of post-filing verification.
Last updated: 2026-10-22.
/ Ready when you are
Tax audit threshold crossed? Form 3CA/3CB/3CD + UDIN due 31 October.
44-clause Form 3CD + Clause 22 Section 43B(h) + Clause 44 GST reconciliation + UDIN + ITR coordination. BQP standard annual tax audit engagement.
FAQ
Common questions, answered.
What's the tax audit turnover threshold for AY 2026-27?
INR 1 crore (goods) / INR 50 lakh (profession) standard. INR 10 crore (goods) / INR 75 lakh (profession) if 95%+ digital receipts. Section 44AD / 44ADA presumptive scheme + turnover below threshold = exempt.
What's Clause 22 of Form 3CD?
Post Finance Act 2023 expansion: specific disclosure of Section 43B(h) MSE expense disallowance in current year + prior year reversal when paid during current year. Udyam certificate collection + 45-day aging + Section 15 MSMED interest. Cross-references MSME Form I half-yearly ROC filing.
What's Clause 44 Form 3CD GST reconciliation?
Reconciliation of Income Tax turnover with GST turnover (GSTR-1 + GSTR-9). Common adjustments: credit notes timing, exempt supplies, year-end returns, discounts, FX exports. Narrative explanation for each unreconciled item. ICAI 2024 guidance clarifies methodology.
Is UDIN mandatory on Form 3CA/3CB?
Yes - ICAI UDIN mandatory for every CA audit report + certificate since 2019. Generated on ICAI portal before signing + attached to Form 3CA/3CB. UDIN verifiable by taxpayer + tax authority against ICAI records.
What's the late fee for missing 31 October tax audit?
Section 234F late ITR filing fee + Section 271B penalty for late tax audit: 0.5% of turnover or INR 1,50,000 whichever lower. ITR filing blocked until Form 3CA/3CB linked on portal. Section 148A show-cause risk from AO.
Does BQP conduct tax audit + file Form 3CA/3CB/3CD?
Yes - standard engagement. CA Durgesh Chavda personally signs tax audit reports as ICAI-qualified CA. Full 44-clause Form 3CD + Form 3CA/3CB + UDIN + ITR coordination. Priority turnaround in October 2026 tax audit window. WhatsApp +91 78018 87130.
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