Integration marketing communications and Public Relations in public and government department are closely connected. In this specialist graduate document, it was written about communications between Tax Administration and International institutions as IOTA and OECD and communications between taxpayer, Media and Tax Administrations. Beside this it was to study the Literatures about generally methods, category of communication further different methods and Authors. Tax Administration as a government institution must have been in continuum and work with ethical codecs and behavior to taxpayers. Digitalization of Tax Administration is good for taxpayers, because they can easier and faster communicate with tax officers about the Theme of this document. Marketing investigation are one of activity of TA and which trends are currently present on market, which taxpayer consume. The Media of Tax Administration is very important for taxpayers because they must be informed about tax obligations through web sites: www.porezna-uprava.hr, and spoken Minister of finance or General Director of Tax Administration true Media to Citizens. The Vision of Tax Administration of Republic Croatia is to give taxpayers the better and quality service, and to make essayer tax compliance and submission documents and require with e- taxation. Also following fiscalization of payment of bills, and a few years ago Tax Administration prepares Prize game „Without bill is not as accounting “, and trough this way Tax Ad-ministration want to simulate the Citizens to report possible fraud to not issuing the Bills. PR managers represent the Government of State, they attempt to make better understanding of some information, they represent Media, in service to Government and Journalists. It needs to be good knowledge and practices in Public. Relations, need to know beliefs of Governments Official, be-ing involved in assessment of work, perfect and clear speaking and literary to express answers, know to make work with stress, know to keep calm in crisis situations.