We carry out reviews of the tax settlements for chosen periods and in relation to particular taxes. The aim of the review is to identify and assess the key tax exposures and indicate the potential tax saving opportunities. We apply the similar methodology, as normally applied by the tax control authorities. The result of our work is the tax report describing the mistakes in calculation of taxes noted during the review and including suggestions, as to the further actions that need to be taken. The review gives the client an opportunity to correct its tax returns prior to official tax control, thus avoiding further penalty interest and other penalties being charged. We also carry out typical due diligence reviews which aim to provide the investor with information on the current tax status of the target company and potential tax risks involved. The tax due diligence helps to identify the key deal breakers and its results may be used in the negotiation of the price of the acquired business.