Thanks again. Hopefully there are no issues.

Thanks for your input. Genuinely appreciated. They are asking for more than my UTR - they are asking for invoices, nature of work, ads placed etc. Evidence like that shouldn't be an issue. BTW are they likely to investigate previous years? I've nothing to hide but I would like to know if this is going to drag on as I am currently very, very busy.

Did anything ever come of this? I am in a similar position.

Hi folks, I really, really hope someone can help me out here. I have been self-employed for 4 or so years but I wasn't registered as self-employed until recently and I am still waiting on my UTR. Since I first became self-employed I have been claiming Working Tax Credit, I recently stopped my claim. Since the start of being self-employed, I have been earning nothing more than a few thousand per year so I have no outstanding taxes to pay. However, my problem is with my Working Tax Credit claim. I recently had a letter asking for evidence for my claim, including my UTR. I am still waiting to receive my UTR. Now I am not sure if not having a UTR is going to affect my Working Tax Credit claim. I know since this April having a UTR prior to making a claim became mandatory but I do not know if this is back-dated? I know I have been very stupid - I am in the process of sorting all my affairs out but I don't know if I am going to be in trouble as a result of this or not. Can they ask me to repay 4 years WTC on the basis I was not registered as self-employed? Any advice greatly appreciated!