In November, HM Revenue and Customs randomly associated someone else’s job to my national insurance (NI) number. I can see where they work, when they started, their payroll number and how much they are earning.
HMRC is now taxing me as if I have two jobs, earning twice as much as I do, and adding on a tax adjustment for the tax it thinks I didn’t pay last year. It’s costing me about £450 a month in extra tax and NI contributions.
