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A sound revenue system empowers a country and sets the pace for a successful fiscal policy, since it provides enabling ground for administrative accountability (Okiro, 2015). It enables the government to provide public services to the citizens and particularly in the developing countries if they are to achieve the Millennium Development Goals (MDGs) (Rahim, 2017). Unfortunately, public service delivery in Nigeria has not met up with expectations (Rahim, 2017; Abasilim & Edet, 2015).
Electronic revenue (E-revenue) services provide convenient revenue collection, with the capacity to improve revenue system and gain a competitive edge (Ndunda et al., 2015). Revenue is the general term for all monetary receipts accruing from both tax and non-tax sources (Ndemanyisho, 2014). Internally Generated Revenue (IGR) is generated within by State governments, which depends on taxation (Omodero, et al., 2018).
State Internal Revenue Services (SIRS) are responsible for the collection and management of internal revenue of every state. According to Edogbanya (2013), IGR as instruments and institutions are still poorly structured in Nigeria. Also, the fluctuating political and economic environments of States in Nigeria reflect critically on IGR in part because institutions and structures (including database) that drive stability in IGR collection and remittance are weak or altogether non-existent. Although, several measures taken by State governments witness a surge, this is neither sustained nor indeed sustainable. Besides this, institutional mechanisms that should drive steady growth are simply not available, the problem is even compounded by hiring tax consultants to manage these aspects of IGR (Onuiri et al., 2015). Despite establishment of different bodies and policy to support the adoption of technology in day-to-day running of the government businesses in Nigeria, many functions are still been carried out manually (Adeyemo, 2011, Oni et al., 2016). Many state governments are yet to fully explore the potential of technology in their operations or comply with the National ICT Policy (Oni et al., 2016). It is on this note that Oni et al. (2016) reiterated the need to investigate internal constraints and factors that impact e-government implementation at state level in Nigeria.
Information Technology (IT) innovation provides organizations the opportunity to improve their efficiency and effectiveness as well as gain competitive advantage. Yet, the slow rate of adoption of these technological innovations by SIRS is a critical issue (Githinji et al., 2014). Technology Innovation adoption is made up of three stages namely: initiation, adoption, and implementation (Thong, 1999). Gathering and evaluating information about the technological innovation is done at the initiation stage, the adoption state handles the decision to adopt the technological innovation and the implementation stage is concerned with implementing the technological innovation in an organization. But research shows that, to date, more concentration is on the implementation stage of e-revenue in particular (Onuiri et al., 2015; Nkanor & Udu, 2016; Chatama, 2013; Efunboade, 2014; Githinji et al., 2014; Adesoji & Chike, 2013). Few research works (Ndunda et al., 2015; Chatama, 2013) have considered the factors affecting IT adoption in SIRS. This is very important for developing countries such as Nigeria, given the current state of technological and economic development and literacy.