The paper covers methodical problems with the process of preparation of reporting data referring to environmentally related taxes being in force in Poland. The need to create this reporting process is due to the new European Union regulations, which impose on Member States the obligation to communicate accurately prepared data to Eurostat. In this paper the author tries to resolve certain methodological dilemmas in this respect. First of all it was necessary to determine a list of environmentally related taxes being in force in Poland, in accordance with the definition of Eurostat. Other methodological problems, taken in the article relate to the allocation of identified environmentally related taxes into one of four generic groups (energy, transport, pollution and natural resources), and then referencing them to the groups of economic activities in the EU (in accordance with the classification NACE Rev. 2). Such classification is required by the new EU regulations. In the article the author also analyzes the existing definition of ecological taxes (and fees) defined uniformly as “environmentally related taxes” in light of the latest interpretation of the Eurostat. The paper also presents legal conditions relating to the whole process of creating statistical reporting of these taxes.