This parallel group randomized controlled trial aims to evaluate the effect of a nurse-led self-management program on taste alteration, nutritional status, and quality of life in women with breast cancer receiving taxane-based chemotherapy. Eligible participants will be randomly assigned to either an intervention group or a control group. Participants in the intervention group will receive a nurse-led self-management program in addition to routine care, while participants in the control group will receive routine care alone. The program is designed to support participants in recognizing, monitoring, and managing taste alteration and related nutritional problems during chemotherapy.