The paper deals with tax inspection in the Republic of Croatia. The terms covered in the paper are tax, tax authority, tax payer and tax inspection. The course of the tax audit is explained, as well as the conclusions and solutions resulting from the tax audit. The aim of the paper is to explain the importance of taxes for the state, since the state collects most of ins income from taxes. The process of tax inspection is carried out by the Tax Administartion, and the most important task of tax inspection is to deteriminate the facts essential for taxation, that is, the resolution of tax matters. Tax inspection is carried out by tax inspectors, tax auditors and other civil servants authorized for its implementation, and during implementation they must act in accordance with the law. The subject of tax inspection is its verification in a certain period of taxation. The tax acts resulting from the tax audit are listed, as well as the legal remedies that the taxpaver can resort to after the tax audit has been carried out. It will be considered whether the regular implementation of tax inspection can have a positive effect on the detection and prevention of irregularities in the work taxpayers, due to the fact that the state is unable to function without the income collected through taxes.