1. Dynamic vs Static: The Core Distinction
| Parameter | GSTR-2A | GSTR-2B |
|---|---|---|
| Nature | Dynamic: Updates continuously whenever a supplier files their GSTR-1, even if late. | Static: Freezes on the 12th of every month. Never changes thereafter. |
| Legal Basis for ITC | Informational only. Not legally binding for monthly GSTR-3B claims. | Legally Binding: Under Section 16(2)(aa), ITC must match GSTR-2B. |
| Cutoff Date | No cutoff. Past invoices appear in historical months. | Strict monthly cutoff based on GSTR-1 filing dates (11th/13th). |
| Best Used For | Annual Audit (GSTR-9) & tracking late supplier filings. | Monthly GSTR-3B return filing and tax payment. |
2. The Final Verdict: Which One Should You Reconcile?
- For Monthly GSTR-3B Filing: Always reconcile with GSTR-2B. Claiming credit based on GSTR-2A when it doesn't appear in GSTR-2B triggers automatic DRC-01C demand notices.
- For Year-End GSTR-9 Annual Audit: Reconcile with GSTR-2A to track suppliers who filed delayed returns before the Section 16(4) cutoff date.