IGST refund processing requires timely electronic EGM filing and prompt rectification of EGM errors to enable export refunds. Refund of IGST on exports requires electronic filing and integration of Export General Manifests (EGMs) with Shipping Bills and valid GST returns; absence or mismatch of EGMs prevents automated sanction of refunds. Shipping Lines/Agents must include ICD-originating Shipping Bills in gateway electronic EGMs or file supplementary EGMs. Jurisdictional officers at gateway ports shall monitor EGM pendency and error reports in ICES, require amendments and approve them, and coordinate with ICD officers to rectify errors in local EGMs or Shipping Bills to enable refund processing.