Thanks for your advice guys, I have no other earnings in the UK, I left to come to Switzerland during 05/06 so was working right up until August. Also, I am not renting through a letting agency, just a private thing to my friend. To be able to claim my tax rebate, I need to complete a 'leaving the Uk' form which asks whether I have a property and if I have any income from it. When I dont complete this form and basically play dumb then I dont have to mention the fact I have this income, however, if I complete the form I cannot ommit that section, dont want to be accused of being a tax dodger, being stupid is much better.