So my DH went self employed about 3 years ago, we registered him as self employed with HMRC. He then set up a limited company that he was a director of (obviously), and we employed an accountant to file his taxes. We have just realised that he has £1600 of fines for not filing self employment tax returns for 16/17 and now 17/18. Do we have a case for an appeal? As in he has been a director of a company and paid taxes through that, and we didn't realise forgot that we had to tell them he therefore wasn't technically self employed any more??