E‑Invoicing: Mandatory for GST Input Tax Credit – How to Verify Your Supplier’s IRN Registration
E‑Invoicing: Mandatory for GST Input Tax Credit – How to Verify Your Supplier’s IRN Registration Introduction E‑invoicing under GST mandates real‑time validation of B2B and export invoices via the Invoice Registration Portal (IRP). Without a valid Invoice Reference Number (IRN), an invoice is not recognized for Input Tax Credit (ITC) claim. Legal Framework Rule 48(4) of the CGST Rules requires notified taxpayers to upload invoice data in FORM GST INV‑01 to obtain an IRN and QR code. Failure to comply invalidates the invoice for ITC purposes. Section 16(2)(a) of the CGST Act further mandates possession of a valid tax invoice by a registered supplier for ITC eligibility. Applicability Timeline Phase Effective Date Aggregate Turnover Threshold I 01 Oct 2020 > ₹ 500 Cr II 01 Jan 2021 > ₹ 100 Cr III 01 Apr 2021 > ₹ 50 Cr IV 01 Apr 2022 > ₹ 20 Cr V 01 Oct 2022 > ₹ 10 Cr Why E‑Invoicing Is Mandatory for ITC Only invoices with IRN‑embedded QR codes are re...