Efektywność szacowania podstawy opodatkowania

Avoiding paying taxes, if is becomes a common phenomenon, inevitably leads to the collapse of public finances. The aim of this publication is to discuss basic tax estimation, the presentation of the essence of the matter and its efficiency evaluation. The important part of the publication is an analysis of the effectiveness of estimating the tax base on the basis of information provided by a representative group of tax offices. The study included the results of the study group offices in the 2007–2011 period. The paper also evaluated the effectiveness of estimating the tax base in the light of the case law of administrative courts. The study shows the small importance of the institution of estimating a tax base as an effective mechanism for reducing the tax gap in Poland. This shows the need for a further reform of the Polish tax system, to simplify tax structure.