The Biggest Mistakes We Saw in the 2025/26 Tax Year
The Biggest Mistakes We Saw in the 2025/26 Tax Year Now that the tax year has come to an end, there’s usually a bit of breathing space. For us, it’s also a natural point to reflect. Not on anything dramatic, but on the patterns we see every year. The small things that, when left unchecked,…









![Self-assessment two month countdown Llewellyns] Flat illustration of a calendar marked 31 January, calculator, and documents in Llewellyns blue, representing the Self-Assessment tax return deadline.](https://www.llewellyns.co.uk/wp-content/uploads/2025/11/Self-assessment-two-month-countdown-Llewellyns-625x625.png)
