Aims: The viability of states today is largely based on the collection of tax revenues, which are considered as necessary for them to carry out their specific functions. Thus, the aim of this text is to discuss the development of citizens' tax culture, not as an isolated economic phenomenon but, as a phenomenon directly linked to their general financial literacy. Because it is the writer's belief that simply complying with the mandate to fulfill the tax obligation is not enough for the citizen to understand his contribution to the finances of his country, or, better, to appreciate this contribution in the context of understanding the ways in which the world moves financially. Methodology: It is a big question on how financially educated the modern man is and to what extent this financial education, his literacy or financial literacy, includes the concept of tax in its content to a sufficient extent to awaken consciences. In this text, the focus is on the exact age / educational stage at which this path to financial and tax literacy can begin, so that it can be integrated in a systematic way into the formal educational process. In order to draw conclusions about the appropriate stage for initiating financial awareness, the trends in the global financial literacy landscape were explored. This analysis aims to determine when it is considered appropriate to teach children financial concepts and how financial literacy is linked to making appropriate financial decisions and tax awareness at different age stages. An effort was carried out to evaluate the current financial and tax knowledge and behavior of Greeks. The research was exclusively bibliographic, i.e., a meta-analysis based on previous qualitative and quantitative studies. Results: Concerning the introduction of systematic financial and tax education for adolescents in schools, the studies accessed suggest that the age range of 12-14 marks a significant milestone for young people to begin delving into the more intricate concepts of the modern economy. Tax awareness among adolescents could arguably be attainable from around age 11 or 12, as they start demonstrating financial comprehension comparable to that of adults. Discussion: The findings of this research showed that the level of financial literacy in Greece depends on demographics, such as the geographical location and the gender of young people. Other factors are also important, but removing geographical and gender restrictions, combined with the provision of training programs already in the upper grades of Primary School, can improve financial awareness and develop the tax culture of citizens. This development requires the implementation of subjects in the curriculum, the training of the teachers so that they are able to teach children even 11 or 12 years old, the distinction of the concept of ethics from tax ethics and its teaching at an earlier age stage, and the drawing from international educational practices, i.e. leveraging successful financial literacy programs worldwide in order to obtain valuable insights for designing effective youth training initiatives.