Looking for some advice please. I work on the road here for a company with a London based head office. All payroll HR is done from London. They have since discovered they have not been processing benefit in kind tax on a company car I’ve had use of since I started a few years ago. I had asked payroll when I started and was told yes it was deducted but not in writing. They are now looking for me to pay the backdated tax via my deduction from my payroll. Is this legal? It was my understanding it’s the company’s responsibility to process taxes correctly , however does the tax bill lie with me?