This study aims to examine the impact of implementing the Core Tax Administration System (CORETAX) on the effectiveness of tax reporting at PT Yekape Surabaya. CORETAX is an integrated digital tax administration system introduced by the Directorate General of Taxes in early 2025. Using a descriptive qualitative approach, data was collected through semi-structured interviews with two key informants directly involved in the company's tax reporting process. The findings indicate that CORETAX positively affects tax reporting efficiency, system integration, and data transparency. All types of taxes can now be reported through a single platform, replacing the previous manual and segmented applications. However, challenges remain, particularly related to human resource adaptation, system navigation, and technical disruptions during the initial phase. PT Yekape addressed these challenges through internal training and interdepartmental coordination. The study concludes that the success of CORETAX implementation heavily depends on organizational readiness—both technical and human—and the strategic role of internal leadership in supporting the digital transition.

Stock investment in the capital market promises two forms of profit, capital gains and dividends. In addition to high profits, stock investments also have a high risk of loss because stocks have a nature high return-high risk. One of the risks posed is the ups and downs of stock prices that occur at any time can cause losses such as capital loss. The purpose of this study was to determine the effect of ROE, DER, and exchange rates on stock prices in BUMN listed on the Indonesia Stock Exchange (IDX) for the 2016-2020 period. The sampling technique is a purposive sampling technique. The sample obtained amounted to 13 companies. The results of the analysis using SmartPLS 3.0 shows that ROE has a positive and significant effect, DER has a negative and significant effect, while the exchange rate has no significant effect on stock prices.