PAYE Coding History and Data Sources

I'm trying to resolve a significant overpayment caused by emergency PAYE codes with a new employer. The employer claims not to have provided my forecast income to HMRC (only actuals). It is also claimed backdated payments paid as a lump sum were reported correctly to HMRC in the sense they were described as covering a large period of time and not just one month. How can I determine the source of the data used by HMRC for my PAYE codes? Also, how can I see my PAYE code history when my online account only shows my current PAYE code and the most recent one previous to it? Thanks

Hi,

You would need to contact our Income Tax team to review.

Income Tax: general enquiries

Thank you.