Our analysis: Code of practice 8 and code of practice 9 tax investigation cases are very complex. With Code of Practice 9 cases, there is immunity for making a full disclosure. If however, the tax payer does not make a full disclosure, there is a risk of prosecution by HMRC. There have been numerous cases of tax payer being sentenced to prison for not making a full disclosure during the Code of Practice 9 enquiry. Our team of tax specialists have extensive experience in dealing with Code of Practice 8 and Code of Practice 9 investigations and negotiating best possible settlements for the clients.