Do I need to calculate my own tax liability?Yes, you must complete the Self-Assessment calculation yourself (pages 32–33 of Form 11).FastTax.ie does this for you automatically.By Cathal Maxwell|2025-06-24T11:26:02+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.