In June I submitted EYU's for a client for the four years ended 5 April 2018, giving rise to a substantial repayment.
I've spoken to HMRC today, and after an hour going through the figures, it's apparent the the updated figures in respect of employee NI has not processed correctly at their end, even though tax, student loan and employer's NI have. The suggestion was to re-submit.
On what basis do I re-submit - from the original FPS figures, or from the EYU figures (i.e. do I resubmit the same EYUs, or just the employee NI figures)?
Using BPT. It seems HMRC's own software cocks RTI up as easily as third party.