HMRC claiming I have underpaid in 19/20 by £1200 - I think I'm due a refund of approx £650!

brassmonk

Ok I just braved phoning them again in the hope I would get someone more helpful than the last time (as the last one was clearly having a bad day and was quite rude to be honest!).

I explained the issue, and the advisor put me on hold to check the sums. She came back and said that by her maths I had overpaid by the amount I thought I had! All she can figure is that the uni was adding me as a new employee each time instead of a continuous one (which to be fair is accurate as it was a number of adhoc contracts) and that it had somehow affected the way my allowances were distributed. HMRC had then done some magical calculation and decided I had underpaid.

Anyway, it is fixed. Cheque should be here in the next couple of weeks!

Thank you all for taking the time to advise, it is much appreciated.