Most bookkeeping guides tell you to “track your expenses” and “keep receipts” as if that alone will save your business from a mess. It will not. Real bookkeeping trouble usually starts somewhere nobody talks about: a mixed personal and business card, a spreadsheet nobody has opened since March, or a quarterly HMRC deadline that quietly changed and nobody noticed. If you run a small business in the UK, 2026 is not the year to keep guessing your way through your books. Making Tax Digital is reshaping how sole traders and small firms report income, and the businesses that get ahead…