With the September 30 tax audit cut-off days away, pressure is real for firms and articles. As of September 28, 2026 (IST), Income Tax portal communications still reflect 30 September 2026 as the due date. Plan for certainty, not hope. Build a tight filing playbook that survives peak‑hour glitches.
Prioritise client sign‑offs, freeze trial balances, and lock Form 3CA/3CB‑3CD disclosures today. Pre‑validate annexures, map Digital Signature Certificate, generate Unique Document Identification Number, and prepare reconciliations. Keep offline JSON backups and a timestamped workpaper trail. If an extension drops later, you will still avoid chaos and rework.
Extension status and e‑filing portal health for CAs
Status check at September 28 (IST): no official portal update changing the due date. Keep the e‑filing homepage’s Latest Updates open during work hours. Expect evening surges; schedule uploads early morning or late night. Save every acknowledgement. If systems wobble, pause, refresh tokens, and retry with cached JSON.
Form 3CA/3CB‑3CD validation errors and high‑risk clauses to watch
Stop schema rejections by matching PAN, TAN, assessment year, and audit category before JSON creation. Test‑upload once per client to surface hidden blockers. Pay extra attention to Clause 21 disallowances under sections 40(a)(ia), 40A(3), and 43B, TDS reporting in Clause 34, and granular expenditure mapping in Clause 44. Document judgement calls contemporaneously.
UDIN generation timeline and mismatch fixes
UDIN remains mandatory for tax audit reports. ICAI has aligned the UDIN generation window to sixty days from the signing date, improving breathing space. However, UDIN revocation is now restricted to forty‑eight hours from generation. If a wrong UDIN is quoted, revoke within window, regenerate, and update the portal record.
DSC mapping and signing issues on the portal
Most signing failures stem from unmapped or expired certificates, or emSigner not running. Verify certificate validity, USB token drivers, and admin rights. Remap under Profile settings using Register DSC, ensuring the certificate is issued to the filer’s Permanent Account Number. Reboot emSigner and browser before the final sign. Escalate with screenshots if repeats.
AIS/TIS–26AS–GSTR reconciliation steps before final upload
Download Annual Information Statement and Taxpayer Information Summary, then match tax credits with Form 26AS. Resolve mismatches using AIS feedback and the Tax Credit Mismatch utility. Cross‑check books and tax audit turnover with Goods and Services Tax returns, especially GSTR‑1 and GSTR‑3B. Record explanatory notes where differences persist, and track rectifications client‑wise.
| Checkpoint | What to verify | Where to check |
|---|---|---|
| AIS vs 26AS | TDS/TCS totals and challan credits | AIS, 26AS, Tax Credit Mismatch |
| GST vs Books | Turnover and tax liability alignment | GSTR‑1, GSTR‑3B, ledger |
| UDIN status | Correct report, date, client PAN | ICAI UDIN portal |
| DSC mapping | Validity, PAN link, emSigner | e‑Filing Profile, emSigner |
Escalation channels and grievance options today
Use e‑Nivaran for portal or form issues; file with clear repro steps, timestamps, and screenshots. For AIS issues, raise a ticket from the AIS help menu. Keep acknowledgement numbers inside workpapers. If revenue impact is material, open parallel helpdesk contact after e‑Nivaran, and document response timelines diligently.
The safest path this week is disciplined readiness. Work off‑peak, lock UDIN and DSC early, and close reconciliations before Friday. Keep an eye on official portals through September 30 for any circulars. Meeting the September 30 deadline without surprises protects clients, fees, and your team’s weekend.
