Addum is a tax refund service designed for business owners, workers, and part-time employees. It simplifies the process of finding hidden refunds conveniently. By leveraging competition among tax accountants, Addum ensures users receive the maximum refund possible. The platform not only supports immediate payment but also offers deferred payment options, easing financial burdens for users.

One of the main features of Addum includes a comprehensive income tax inquiry for the past five years, automatic submission of user income data to participating tax accountants, and automatic calculation of refund amounts. Users can also engage in a community called 'Money Meeting' to discuss financial topics and participate in events offering gift certificates. For more information, users can visit their website, submit additional materials, or contact them via email or KakaoTalk Channel.