In this enlightening talk, we delve into the three cardinal mistakes Amazon sellers often make in their accounting practices, which can substantially impede their growth potential. Firstly, we uncover the pitfalls of insufficient inventory management, emphasising how accurate tracking and forecasting are crucial for financial health and strategic planning. Next, we explore the common oversight of not fully integrating accounting software with the Amazon platform, highlighting the importance of seamless synchronisation for real-time financial clarity. We then address the issue of neglecting tax compliance and its complexities, particularly in international markets, underscoring the necessity of staying informed and prepared to avoid costly penalties. Throughout the talk, practical solutions and strategies are provided to not only circumvent these errors but also to enhance overall business efficiency and growth potential. The session concludes with an emphasis on the power of leveraging expert guidance and advanced tools in navigating the intricacies of ecommerce accounting, setting the stage for sustained success and expansion.