To Örebro University

E-tax is an important function of e-government since it is highly related to the life of citizens (Wu & Chen, 2005). So in this paper I have discussed the factors influence the citizen adoption of government e-tax service. I have used the decomposed TPB model as my research model. This model integrated two important theories – TAM model and TPB model. The taxpayers were divided into adopters who have used the e-tax service and non-adopter who has used the conventional method to pay their tax. And the effect of these factors for adopters and non-adopters are different. Therefore, understand the factors’ effect can help governments formulate the corresponding measures to promote more citizens to use the e-tax service and lead to better planning and implementation of e-tax service.