Gelantaga-an, Evelyn. “Benefits and Challenges Encountered by Business Taxpayers in Using the Bureau of Internal Revenue Electronic Filing and Payment System (BIR E-FPS)”. International Multidisciplinary Journal of Research for Innovation, Sustainability, and Excellence (IMJRISE) 2, no. 5 (May 28, 2025): 814–831. Accessed August 25, 2026. https://risejournals.org/index.php/imjrise/article/view/1177.