It seems I am one of the unlucky 1.4million who have recevied a P800 notice from HMRC telling me I have not paid enough tax. The years in question are 2008 - 2009 and 2009 - 2010. For the year 2008 - 2010 I underpaid by £359 and 2009 - 2010 by £364. Not massive amounts compared to some of the demands people have received but given as HMRC have stated anything under £300 will not be persued, I did some digging around to see if there was anything I could claim in allowances to knock £60 per year off my tax bills and I found this: Wash your uniform at home ? - MoneySavingExpert.com Forums You can claim an allowance if your employer provides you with a uniform but no laundry facilities (unfortunately armed forces are not included as they allegedly provide a laundry service) Here is the link from HMRC: Other expenses: flat rate expenses: table of agreed amounts for 2004/05 onwards I dont know if I will have any success but I have written them a letter asking for the allowance and for my P800 to be recalculated.