HMRC won't catch your tax mistakes for you. One person got hit with a surprise bill in 2022-2023 and now reviews his payslip every few months, adjusting his tax code early in the year to avoid owing money at the end.
The overall theme is that when it comes to taxes and finances and everything, you can't assume that HMRC is sorting it out, or even your accountant is sorting it out.
For me, I was hit with it, I think 2022, 2023. HMRC just slapped me with one that I, I was heartbroken for like a week. So what I do is every couple of months I look at my payslip, I look at where we are at, then I adjust it. So at the end of the tax year I know that HMRC cannot get me because whenever I adjust it, they adjust my tax code. So even in January, I still increased a bit. I knew I was not going to earn that much, but I still increased it to that level so that at the end of the day, I know I'm going to get some money back from HMRC because I did not want a situation that 3 years ago I was like, I was heartbroken.
