At first I was incredibly impressed. I approached them with a bit of a mess on my hands and they were fast & efficient. I almost thought it was too good to be true, especially for the low price they charge. What ended up happening was this: initially I was told HMRC owed me £303. Then tax doctor advised I actually owed HMRC £303 and that they'd made a mistake. I paid their £99+VAT bill, they submitted my tax return. I was happy until I received a bill from HMRC for £550. Fortunately paying the bill wasn't a problem. I emailed tax doctor and asked them politely how I'd gotten a bill from HMRC that was so drastically different from what they'd worked out. I'd mentioned that if I was a bigger company that 81% increase (or 45% difference) could have meant incredible differences in monies owed. The guys at tax doctor NEVER replied to my email. Still to this day they've both just ignored me. No explanation. People like me hire people like them so that we don't have to do our tax returns. For this reason I don't find this level of inaccuracy acceptable and neither is the customer service (or lack of). For this reason I won't be recommending tax doctor to anyone I know. I know this company has a lot of positive reviews so either those are fake or perhaps I got unlucky.