I just realised I paid my self-assessment tax bill (last week) using the wrong UTR. I got one digit wrong when I input the reference doing the bank transfer (online banking)
I've just spent 20 mins on the HMRC website trying to work out how on earth I rectify it. I tried calling the relevant number but got cut off because 'all our advisors are busy'.
Arrrgggghhhhhhh.... What do I do?