MEJJI O, DARKAOUI A, TAILAMTE A, ABBASSI Z. Role of the tax reform Unique Professional Contribution (UPC) in the formalization of the informal sector: Case of the region Beni-Mellal Khenifra. IJAFAME [Internet]. 2026 May 7 [cited 2026 Nov. 11];7(5):419-42. Available from: https://ijafame.org/index.php/ijafame/article/view/2403