GSTN advisory on e-Invoice API, e-Way Bill (by IRN) API and EWB Closure API — mandatory Ship-To GSTIN capture and voluntary EWB closure. Per GSTN advisory dated 17 June 2026, the e-Invoice / EWB-by-IRN / EWB-Closure APIs are being updated so that "Ship-To GSTIN" is mandatorily captured in Bill-To/Ship-To transactions — with the value "URP" entered where the consignee is unregistered — alongside the voluntary closure of e-Way Bills. The changes are live in the Sandbox for testing and go to Production with effect from 1 August 2026 (extended from the earlier 15 June date). Complete ERP / GSP / IRP changes, testing and master-data cleanup before go-live. No central CBIC notification or circular was issued in the 14–22 June window, and no GST Council meeting was held. Source