Subject to the tax are undertakings operating in Poland and engaged in the retail sale of all sorts of goods. The tax base is the monthly turnover generated by an undertaking from retail sales. The tax features a progressive rate structure with 3 different brackets and rates. While a tax based on turnover as such does not raise any State aid issues, the Commission considers at this stage that the progressivity of the tax rates constitutes State aid. The European Commission invites interested parties to submit comments pursuant to Article 108(2) of the Treaty on the Functioning of the European Union. Interested parties may submit their comments before 4 December 2016.