This thesis was developed within the Tax Administration Management of the Provincial Municipality of Loreto – Nauta in the year 2023, which presented integration problems in the decision-making processes and which until then did not have an application that is friendly and understanding to obtain a situational diagnosis that helps predict better tax collection. Reason why the following research question was intended to be resolved: How to improve decision making in the GAT of the MPL – N through the use of a Business Intelligence Application? Whose general objective was: Optimize decision making in the Tax Administration Management of the Provincial Municipality of Loreto - Nauta, through the use of a Business Intelligence Application. Being an applied type research and at a descriptive and applicative level with a quasi experimental experimental design with post-test and control gro...