The subject of this paper is the role of artificial intelligence in customer support with a focus on the development of chatbots with natural language. The paper analyzes the business case of introducing a chatbot for e-Invoice in the Financial Agency (FINA), which recognizes the potential of artificial intelligence in customer support. The goal of introducing a chatbot is to answer frequently asked questions about the e-Invoice and to provide users with quick and simple help. Objectives of the work: C1. Study the role of artificial intelligence in customer support, C2. Analyze the needs and requirements of FINA e-Invoice users, C3. Design and implement a chatbot for FINA e-Invoice, C4. Evaluate and improve the chatbot, C5. Draw a conclusion about the contribution of artificial intelligence in customer support. The following methods were used in the research: compilations, comparisons, descriptions, deductions, syntheses and analysis methods. Used available literature, both in print and in digital form. Analysis of the available scientific and professional literature concluded that sophisticated tools such as chatbots can be used to optimize business processes. The evaluation of the chatbot, carried out through detailed testing and the definition of evalua tion metrics, shows that the chatbot is capable of meeting the needs of users in a large number of cases, with high accuracy and efficiency. Continued research and innovation in this area can bring additional benefits and opportunities to improve the user experience and the efficiency of business operations. The recommendation for future projects includes continuous monitoring of chatbot performance, timely updating of information and maintaining a high level of quality of user experience.