Regional economic integration has been an increasing priority among many African nations. Adequate information fosters better trade relations among nations. This paper investigated the scope, structure and fiscal policy implication of West Africa trade zone. Relevant data and information and materials for the study were obtained from Central Bank of Nigeria’s Statistical bulletin, 2018, textbooks and published journal articles. Econometric analysis of Ordinary least square was used in the analysis. The result showed that the absence of formal contact and adequate market information was smooth trade relations amongst the West African countries. It was found that policies on trade partners in West Africa’s Trade Zone have significant effects on the external performance of the Nigerian economy either positively or negatively. It was further revealed that tax a contractionary fiscal instrument can be used to regulate the external sector of the Nigerian economy in West Africa’s Trade Zone.