I generally call it car tax :shrug:
As in, "I'm going to the post office to pay my car tax"
I don't think I've ever called it road tax.
I feel ashamed now :down:
As I said, it's an old chestnut and hardly fair to criticise people who call it tax rather than excise duty. But if it makes them feel better about themselves then so be it.
Yet when you go to pay your 'excise duty' the website calls it tax :shrug:
You can't blame people for calling it tax, when even the people who demand it from you call it tax.
https://www.gov.uk/vehicle-tax