No / The study explores the adoption of an electronic government (e-government) system called online PAN card registration system (OPCRS) in context of India. The study validates the extended theory of reasoned action (TRA) to understand the impact of some of its factors on the citizen's intention to adopt this system. The proposed research model is extended with the variables including perceived usefulness, perceived trust, and self-efficacy as antecedents of attitude and subjective norm, which are the core constructs of the TRA. The eight hypotheses were formulated between six constructs of the proposed extended TRA. The proposed research model is validated using the usable sample of data gathered from 377 respondents. The data was analysed using AMOS 22.0. The empirical findings of the proposed research model indicated the significant relationships of all proposed hypotheses. The study also provides its limitations, future research directions, and implications for theory and practice toward the end.