I submitted self assessment in January, dutifully paid my £3k tax bill, and have started saving for the £1.5k I also have to pay in July in giddy anticipation for next year.
But now I’ve been told I also owe £163 right now! Indeed apparently I’m paying interest on it. But why? I’ve paid my tax bill in full (statement confirms this), so what is £163 about?
thanks for any help!