When do I have to pay Gift & Inheritance Tax? a) A Self Assessment return is due once a year on the 31st October in respect of any benefits received in the year ended 31st August in that year. By Cathal Maxwell|2025-05-23T08:24:36+01:00May 23, 2025|Tax Return Self Assessment 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.