Is your Tax Code Suddenly Beyond Understanding?
This is because HMRC have introduce something called “In Year Adjustments” where they attempt to collect tax you might have paid through Self-Assessment. It probably is something that is unpredictable by you and certainly by HMRC but they will have a go at estimating and taxing it. I think dividends and pension income are are key targets.
These code change can be CHALLENGED and CORRECTED. If you are concerned about your code please get in touch.
I have had 3 cases of this in the last month, all easily dealt with.