The e-government implementation in developing countries is always less successful and objectively hard to achieve and the reason behind is a less citizen-centric approach. Therefore, the effect of trust and social influence will be studied while understanding the adoption behavior of citizens in developing countries. Specifically, a case of selected e-service (e-filling of taxation by ‘Federal Board of Revenue' (FBR)) will be studied in Pakistan. The sole purpose of the study is to pull the external factors like trust and social influence to increase e-government adoption in the massively populated region of the world. The quantitative approach will be followed where the current users of selected e-service will be inquired under the modified version of a generic framework of ‘Technology Adoption Model' (TAM). The sample size of 153 is filtered and analyzed by using Structural Equation Modeling (SPSS AMOS) to study the intentions of the citizens. In methodological terms, deductive, quantitative method is adopted in interpretive philosophical manner. Collectively, trust and social influence are studied in order to find the impact on the intentions of citizens in the developing countries. However, the trust is the strongest predictor after social influence is recorded. Similarly, the usefulness observed to be a strong predictor of intentions in comparison of ease of use in the current scenario.