Does your input credit position support a refund claim, or just a return?
Chennai's export base changes what the books have to prove. An exporter supplying at zero rate accumulates input credit rather than using it against output tax, and that credit is recoverable as a refund rather than left sitting in the ledger. Whether the refund is straightforward or contested depends almost entirely on how the books distinguished export supplies from domestic ones, and they have to do it from the first entry rather than at the point of claiming.
Mixed export and domestic supply in the same ledger set, foreign currency receipts, input credit accumulating against zero-rated supplies, and for the engineering and leather segments a manufacturing layer with job work and unit conversions.
The separation is the whole discipline. Zero-rated export supplies under a Letter of Undertaking, domestic supplies carrying output GST, and the input credit attributable to each kept distinct throughout. Books that blend the two produce a credit balance nobody can substantiate, and a refund claim built on an unsubstantiated balance is a claim that gets queried. Since October 2025 low-risk refund claims have been receiving substantial provisional sanction within about a week on an automated risk score built largely on filing history, which means a clean monthly record now converts directly into faster cash rather than merely into a quiet life.
Tamil Nadu professional tax is administered by local bodies on a half-yearly cycle rather than monthly, which payroll configured on the Maharashtra or Karnataka pattern silently skips.
The reason this stopped being a matter of tidiness is that reconciliation moved upstream of the return. Auto-populated outward liability in GSTR-3B has been non-editable since the July 2025 tax period and Table 3.2 has been system-locked since the November 2025 period, so a mistake in GSTR-1 is corrected through GSTR-1A before you file rather than adjusted afterwards. The Invoice Management System treats inaction on an inward invoice as acceptance, so input credit is settled by what happened during the month. And a GSTR-3B cannot be filed more than three years after its due date, so an old backlog is a shrinking asset rather than a static problem. The month is now where compliance is decided, and the return only reports it.
| Item | Position as at August 2026 |
|---|---|
| Who must keep books, individuals and HUF | Income above Rs 2,50,000 or turnover above Rs 25 lakh in any of the 3 preceding years |
| Who must keep books, others | Income above Rs 1,20,000 or turnover above Rs 10 lakh, on the same test |
| Governing provision | Section 62 of the Income-tax Act, 2025, which carries forward the old section 44AA |
| Penalty for not keeping them | Rs 25,000 under section 441 of the Income-tax Act, 2025 |
| Electronic books | Rule 46(8) of the Income-tax Rules, 2026 requires a daily backup on servers located in India |
| Retention, income tax | Seven tax years from the end of the relevant tax year, under Rule 46(9) |
| Retention, Companies Act | Eight financial years, section 128(5). The longest applicable period governs |
| Retention, GST | 72 months from the due date of the annual return, extended during proceedings |
| GST edit log | Rule 56(8). Required for electronic records, every registered person, since 2017 |
| Company audit trail | Rule 3(1), Companies (Accounts) Rules 2014, financial years from 1 April 2023 |
| GSTR-3B outward liability | Auto-populated and non-editable since the July 2025 tax period |
| MSME creditors | Deduction deferred until paid where a micro or small supplier is paid late |
| Plan | Fee | Built for |
|---|---|---|
| Essential | Rs 2,499 a month | Up to 100 transactions a month, one GSTIN |
| Growth | Rs 6,999 a month | Up to 400 transactions, up to three GSTINs |
| Controller | Rs 17,999 a month | High volume, multi-state, or reporting to outsiders |
| Backlog clean-up | From Rs 9,999 | Prior periods rebuilt, sequenced oldest first |
| Books health check | Rs 4,999 | Written diagnosis, credited against the first retainer |
Priced on transaction volume and the number of GSTINs rather than on turnover, because that is what actually drives the work.
Every price above is a professional fee, excluding GST and government charges. 50% on delivery.
All fees and charges listed are indicative only and do not constitute a binding offer. Final amounts may vary depending on the volume of work and the complexity involved.
From the first entry, not at the point of claiming. Export supplies zero-rated under a Letter of Undertaking, domestic supplies carrying output tax, and the input credit attributable to each tracked separately throughout. A blended ledger produces an accumulated credit balance you cannot substantiate, and an unsubstantiated balance is what turns a routine refund into a queried one.
Directly, and more than it used to. Refund claims are risk-scored, and the score draws heavily on filing history, so clean and timely returns translate into faster provisional sanction while a patchy record translates into scrutiny and delay. For an exporter carrying accumulated credit, the monthly close is effectively a working capital decision rather than a compliance one.
A significant one, and it is commonly misunderstood. Supplying to an exporter is a domestic supply carrying GST in the ordinary way. Zero rating applies to your own exports, not to sales made to somebody who then exports. There are specific concessional routes for supplies to certain categories of exporter, with their own conditions, but they are not automatic and books built on the assumption that anything export-adjacent is zero-rated will be wrong.
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Reviewed by the CA and CS Team, CorporateWalla · Last updated 17 August 2026 · · Sources: GST portal, Income Tax Department, Ministry of Corporate Affairs, Udyam Registration portal
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