This publication is on a study that investigated the effect of the e-Tax System on the service quality with the Uganda Tax collection Agency as a case study. The research focused on the clients who use the e-Tax system for paying taxes and other related services. The study, investigated the effect of the introduction of the e-tax system on the quality of service to the taxpayers. The specific areas investigated where the effect of electronic assessments, the effect of electronic filing of tax returns, and the effect of electronic payments on service quality. Primary data was collected from a sample of 100 users of the e-tax system in Uganda. This publication contains the findings and recommendations from the data that was collected.