When should I file my Form 11 Income Tax Return For 2025?A. No later than 31 October 2026 or Wednesday 18th November 2026 if filing online via Revenue’s ROS or using FastTax.ie.By Cathal Maxwell|2026-09-25T12:27:17+01:00May 23, 2025|Tax Return Deadlines FAQs|Share This Story, Choose Your Platform!FacebookXBlueskyRedditLinkedInWhatsAppTelegramTumblrPinterestXingEmail About the Author: Cathal Maxwell Cathal brings over 40 years of tax experience, advising individuals and businesses on Income Tax, Capital Taxes, Inheritance Tax, Stamp Duty, and VAT.