GST IT Advisory

The GST regime is, at its operational core, an IT regime. Every invoice generates an IRN on the IRP, every truck movement generates an e-Way bill on the EWB portal, every supplier's GSTR-1 filing generates a line in your GSTR-2B, every cash and credit ledger entry sits on the GSTN portal, and every annual return reconciles to data the portal already has. By 2026, the difference between a tax-compliant enterprise and a notice-prone enterprise is rarely about intent — it is about how cleanly the ERP, the IRP, the EWB system, and the GSTN portal speak to each other. Manual data entry, Excel-based reconciliation, and disconnected master data are the three biggest sources of the ASMT-10 / DRC-01 notices that flood the Department's queues.

GST IT Advisory is the discipline of designing this integration. The questions are concrete: how does Tally Prime / SAP S/4HANA / Oracle Fusion / NetSuite / Zoho Books / Microsoft Dynamics generate invoices that comply with the e-invoice JSON schema; how does it call the IRP API to obtain the IRN and signed QR code; how does it auto-populate GSTR-1 from sales data and reconcile it against the IRN log; how does it pull GSTR-2B and run an ITC matching engine against the purchase register; how does it generate e-Way bills via API rather than manual portal entry; how does it track Rule 37A reversal supplier-wise and reclaim invoice-wise; and how does it produce a transaction-level audit trail that survives a Section 65 audit or a DGGI investigation.

We design and operate this stack — vendor-neutral, format-agnostic, integrated with your existing IT investments — so compliance becomes a by-product of normal operations rather than a month-end firefight.

The Integration Surfaces We Cover

• ERP-to-IRP (e-Invoicing API):: Direct API integration between ERP and the Invoice Registration Portal; IRN, signed QR code and acknowledgement persisted to ERP; cancellation within 24 hours handled programmatically; backup print formats with QR.

• ERP-to-EWB (e-Way Bill API):: API-based EWB generation, vehicle update (Part B), consolidated EWB for transporters, distance auto-calculation, expiry monitoring; integration with logistics partner systems.

• GSTR-1 Auto-Population:: Sales register reconciled to e-invoice IRN log; B2B / B2C / export / SEZ / RCM bifurcation automated; credit / debit notes mapped; HSN summary auto-built.

• GSTR-2B Matching Engine:: Monthly GSTR-2B pulled via API; matched against purchase register on supplier GSTIN, invoice number, taxable value, tax — exact match, partial match, missing-in-2B and missing-in-books buckets reported.

• ITC Eligibility Engine:: Section 17(5) blocked-credit categorisation at chart-of-accounts level; Rule 42 / 43 proportional reversal automated; capital-goods register linked to ITC ledger.

• Custom Compliance Dashboards:: Real-time view of GSTR filing status, ITC mismatch quantum, RCM payable, e-invoice cancellations, e-Way bill expiries, supplier-wise risk scoring.

ERPs and Tools We Work With

Tally Prime / TallyPrime Edit Log, SAP S/4HANA, Oracle Fusion / EBS, NetSuite, Microsoft Dynamics 365, Zoho Books, ClearTax, IRIS, Avalara, Cygnet, Webtel, GSP / ASP integrations — vendor-neutral; we work with what you have.

Why a Bolt-On Tool Is Not Enough

A standalone reconciliation tool can reconcile GSTR-2B against your purchase register only if the purchase register is itself clean — vendor master with correct GSTINs, invoice numbers in canonical format, tax rates correctly applied, no duplicate entries. Most reconciliation pain originates upstream, in the ERP. Our advisory begins at the master-data layer (vendor / item / tax masters), proceeds through transaction-capture (invoice posting workflows, RCM trigger logic), and ends at the reporting layer (GSTR-1, GSTR-3B, GSTR-9, GSTR-9C, dashboards). Bolt-on tools then ride on a clean foundation — not the reverse.