The tax authorities in most of the countries show concern that the prices of goods and services negotiated between related parties of the same economic group are properly fixed in order to fairly allocate the income among the different countries. In Argentina several regulations have been enacted establishing the obligation to make an analysis of the operations with related parties and with companies located in countries with low or zero taxation. Every year, companies shall file a tax return supplementary to the Income Tax, providing a detail of the operations subject to analysis. Our services are focused on the constant evaluation of the prices fixed for transactions in order to optimize the results complying with the applicable standards. Furthermore, we prepare the Tax Returns and the Annual Report, which requires the assistance of an independent auditor. To that effect, we have electronic data bases of comparable transactions and companies, with the economic analyses required by a team of certified public accountants and economists.