PAYE
I wonder when HMRC is going to fix their systems.
When people change jobs often, their system don't always register that they move jobs and so the tax projection assume one has multiple fulltime jobs running concurrently eventually making them pay higher tax rates than they should. Then they have to spend hours on the helpline to get it sorted - that of course if they manage to get someone pick up the phone and then wait for the tax refund cheque
Truly 2022 Britain.