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The Top 10 Self Assessment Tax Return Mistakes - and How AI Can Help You Avoid Them

January 30th, 11:47 PM. Cursor hovering over Submit. That nagging voice: 'Are you sure you haven't missed anything?' Here's how AI caught four expensive mistakes I would have submitted.

21 November 2025 • 16 min read

January 30th, 11:47 PM. I'm sitting at my desk, tax return 95% complete, cursor hovering over the "Submit" button. And I've got that feeling. You know the one. That nagging voice that says, "Are you absolutely sure you haven't missed anything?" Because once you click that button, it's done. If you've made a mistake - missed income, claimed something you shouldn't have, calculated wrong - you're either overpaying (annoying) or underpaying (very annoying when HMRC finds out and adds penalties). ...

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