KARACHI: Karachi Tax Bar Association (KTBA) has requested the Federal Board of Revenue (FBR) to extend the deadline for filing annual income tax returns for Tax Year 2025 till October 31, 2025, citing severe technical difficulties with the IRIS tax system and post-flood rehabilitation challenges. In a letter addressed to FBR Chairman Rashid Mahmood Langrial, KTBA highlighted critical system failures that have severely hampered taxpayers’ ability to meet compliance requirements. KTBA said that numerous computation errors and glitches in return forms have made compliance an impractical exercise. The letter further said that constant modifications to formulas and computations have made it impossible for taxpayers to finalize draft returns, adding that many users have reported that…