The Tax Terminology Dictionary is the first Slovenian terminology dictionary with definitions from the field of taxes and contains 972 entries with 993 English and 942 Croatian equivalents. The terms are explained with terminological definitions that represent the conceptual system of the Slovenian tax system. The dictionary was created on the basis of a conceptual approach involving the interdisciplinary participation of field experts and terminologists. In particular, it is aimed at professionals dealing with taxation, protection of taxpayers' rights, or public finance, as well as professionals dealing with tax-related systems such as social work. The dictionary is distributed in XML using the TBX (TermBase eXchange) standard for representing and exchanging information from termbases.