In this work the main function of Panevėžys Custom Office (CO) Taxes Subdivision is studied. This function involves an accounting of paid taxes, a superintendence of payments and a control of State Tax Inspectorate (STI) includings. The main purpose of this work was to make Information System (IS), which makes registration and accounting of taxes obligations of economy subjects in CO better, improves their control and analysis, facilitates search and creation of various reports in CO. The situation of tax accounting in Panevėžys CO has been analyzed. The condition of accounting software in Panevėžys CO as well as in another four CO has been analyzed. The review of already installed and being installed IS at Custom of Lithuania was surveyed preparing this work. After the review, the structural – functional projecting method for a creation of IS has been chosen. To form and describe a conceptual model of Date Base (DB) ER modeling is used. IS was created in Microsoft Access 2003 environment. This IS preserves, stores, manages and analyses all data about economy subject’s custom procedures, paid taxes and made inclusions. This IS generates required reports. A trial version of this IS was installed in December 2002 in Utena subdivision accounting department of Panevėžys Custom Office.