KARACHI: The Karachi Tax Bar Association (KTBA) has requested the Federal Board of Revenue (FBR) to extend the deadline for advance tax payments until October 10, 2025, and halt recovery actions against taxpayers who missed the September 15, 2025 deadline due to persistent technical failures of the IRIS portal. In a letter sent to the Chairman of the FBR, the KTBA said that individual taxpayers were unable to comply with their first-quarter advance tax obligations under Section 147 of the Income Tax Ordinance 2001 for the tax year 2026 due to the malfunctioning IRIS portal. "Despite system-generated notices reminding taxpayers of their September 15 deadline, most individual taxpayers were unable to comply by the deadline due to IRIS portal non-functionality," the letter stated.