So, we have a client who was one who received an amended tax calculation from HMRC where they had doubled up the seiss grant. It turned a £1600 repayment (due to CIS) into a £300 bill.
We wrote to HMRC advising that it was wrong and asked them to correct. The taxpayer phoned HMRC yesterday and HMRC said they won't amend their calculation, we had to file an amended return.
I am astonished by this. Surely they should amend the calculation that they've got wrong. I did file an amended return as the taxpayer needs the money.