This research project aims to demonstrate the efficiency of behavioral science tools on municipal tax compliance and public policy issues. Specifically, the impact of treatments carried out on taxpayers in the district of Villa María del Triunfo within a tax amnesty campaign is evaluated using the Differences in Differences model. For this, a sample of 10,000 taxpayers was provided, where the treatment group was given informational letters with messages that appealed to reciprocity, and the control group, letters with a standard message. In addition, from the treatment group, a subsample was taken to carry out a survey in which the perceptions of taxpayers about taxes and municipal management were collected to understand their motivations or barriers that influence the payment or not of taxes. their tributes. The latter was arranged with the purpose of providing greater support to the r...