Am so glad this thread is still going (altho sorry for all my fellow sufferers at the hands of the tax f'ing credit office of course).
2plus2plus1 - how did they manage to overpay you by 8K? I thought our 6K was bad enough. God aren't they tossers. (or the system, rather).
Have just spoken to my accountant who is working out what my and DH's income was for the last tax year (05-06) so I can finally tell the tax office. Hopefully with some back calculating they will then reduce the overpayment.
My accountant also confirmed that to recover the overpayment they reduce the future payments and then 'if that doesn't work' (don't quite know what that means) they do attach to your PAYE.
As DH and I have only in the last 2 months gone back to employment after self-employment, and thus only just started paying PAYE, I bloody hope they don't latch onto our PAYE. It's bad enough that we won't be getting any tax credit for god knows how many years.
God what a f'ing stupid stupid system. We have no savings, I will have a £5K income tax bill to pay in Jan as well. The only thing we can do is extend our mortgage. I could weep, I really could.