Hi, thanks for your reply. They are actually checking that my husband and I received the correct amount of child tax credit for the year 2013/14. We no longer receive it. According to them they do this with quite a number of people each year. The income I declared does match and is correct but my worry is that they have asked for my expenses and much more in depth information than they asked for previously. My expenses are correct but what I have seen on the internet today leads me to believe that, although I am self-employed and work from home as well as at two other regular location, I should not be claiming mileage. I am concerned this will trigger an assessment of my previous self-assessments and that I will end up owing a lot of money or worse, be in serious trouble. I suppose I need clarification of whether my base of operation would be classed as home or not. The other question is whether I raise this with HMRC or wait to see if they query it.

Hi, Ireceived a very worrying letter from HMRC yesterday. They want to do a compliance check on my husband and I regarding child tax credits we have claimed. We had to do one a few years ago but it didn't ask anywhere near as much info as this one - anyone know why his may be? I am very, very stressed about it. It's the week before Christmas, I am having major building work done at home and they want all this info (one year's bank statement/all my self-employment info/letters from childcare providers)by 19th Jan. I have been trying to pull it together today and have been looking at some information on the internet at home. I am not sure whether I have to provide a breakdown of mileage as they want my expenses. But it is this which is worrying me. I am self employed. My company is registered at home. I do research and reading and some writing at home for my job but I predominantly work in two other locations on an ad-hoc basis. The info I have read says some things about bases of operation which has led me to question whether I should be claiming mileage as have indeed for the past six years. I am now very concerned about what could happen if they want to scrutinise my mileage and discover that I am not supposed to claim. I genuinely thought I was entitle. Please help.