I left in 1999 and got a decent job and from then untill 2007 my tax was sorted correctly as advised when I left i.e. my RAF pension was at 20% base rate and all allowances and any 40% tax liability came off my wages. Then in 2008 when the new computer was put in that was when the trouble started, it was discovered that I was in the 40% tax bracket and had not paid enough tax for the previous year (2007) and my personnel allowance would be reduced to claw back the money owing, come 2009 they reduced this furhter as apparently I owed them for 2007 still and now 2008, I have been fighting them since on and off.By the way anyone who is now in the 40% bracket don't forget you should let the HMRC know how much a year you pay into charities as this increases your personal allowance. This year I have been told that I owe £371 for last year so my tax code going forward is 146L, I have a raft of documents from the tax office along with the gen on the notice off coding instructions and I know how they work it all out and using their own tax calculator choosing option for two incomes it will tell you if you have paid too much tax (based on the P60s gen).I did get the original princely sum of tax owing written off as they had failed to manage my tax affirs correctly, and then they told me when I declsred my charitable payments that they actually owed me £721 when I did not get it I phoned and then got a new notice of coding telling me I actually owed them this amount after several weeks of phone calls and letters and I finally got the check. I find the best thing to do is let them get on with it, but what really annoyed me last year and this is the budget announcement that by increasing the personal allowance a lot more people would pay less, or none at all of their wages at 40%, then they actually lowered the 40% threshold which meant last year my wages went down by £70 a month and this year they did it again so I will actually be paying another £7 a month in taxes from this pay day, and with the lower personal allowance this year my wage packet is going to be less per month than it was two years ago and I have had two reasonable pay rises as well, so I have just resigned myself to the fact that the government/HMRC are robbing gits and the more you try and fight them the more they shaft you.