The 11 tax offices of the Free State of Thuringia are responsible for the assessment and collection of taxes, with the exception of municipal taxes. As state tax authorities at local level, their areas of responsibility are delineated according to local and material areas of competence.

A major focus of the tax office's activities is the processing of tax returns from employees and other taxpayers.

The tax office uses the information provided in tax returns and any other information available, for example from employers, health insurance companies and insurance companies, to determine the basis of taxation, set the respective taxes and collect them. Almost all concerns can be raised and information provided, for example on tax returns, in the telephone service area.