TallyPrime GSTR-2B & 2A Integration - Auto ITC Reconciliation

GSTR-2B and 2A input tax credit reconciliation is the highest-friction monthly compliance activity for every Indian business that claims ITC. The manual workflow — download the JSON, open in Excel, match line-by-line against the Tally purchase register, chase every mismatch — consumes 3 to 5 full days per GSTIN per month, and it happens under the pressure of the 20th-of-month GSTR-3B deadline. This connector automates the entire cycle end-to-end. GSTR-2B is fetched from the GST portal via the Connected GST API path the moment it publishes for a return period. GSTR-2A is polled every 6 hours during the filing window because 2A is dynamic — new supplier filings keep landing until the 11th. Every fetched invoice is matched against the Tally purchase register using invoice number, GSTIN, and amount, with configurable tolerance for split invoices and partial supplies. Mismatches are categorised (missing on portal / missing in books / rate diff / GSTIN diff / cancelled supplier) with a drill-down link to the offending voucher.

The vendor follow-up cycle is one of the most painful parts of ITC reconciliation, and this connector makes it painless. When an invoice is missing from GSTR-2B but present in Tally, the vendor is auto-queued for a WhatsApp follow-up using pre-approved DLT templates. When a supplier GSTIN gets cancelled between invoice date and reconciliation, the connector flags the ITC reversal need with the exact voucher list. Cancelled buyer GSTINs — the classic ITC-reversal trap — are caught pre-filing, not after the tax notice arrives.

Multi-GSTIN group setups are directly supported. Each GSTIN has its own mismatch queue, its own dashboard, and its own audit trail — statutory boundaries stay clean — but the finance controller has one consolidated view across every group entity. Runs in India region end-to-end, with GST portal and inference calls staying inside ap-south-1 for DPDP Act 2023 alignment.