专项附加扣除信息确认必看，个人所得税App登录问题一图了解

Group 1 - The article provides guidance on how to reset passwords and change mobile numbers for the individual income tax app, emphasizing the importance of account security [3][4][5] - It outlines different scenarios for changing mobile numbers, including when the device is unchanged, when only the mobile number is changed, and when both the device and number are changed [4][5] - The process for verifying identity through a bank card is detailed, indicating that the pre-registered mobile number must match the new number being bound [4][5] Group 2 - The article includes a reminder about the non-official nature of the platform, stating that the content is for educational purposes and not actual tax standards [9] - It mentions a tax service hotline for inquiries related to tax deductions for children's education, specifically for students transitioning from undergraduate to graduate studies [11][12] - The article clarifies that companies cannot retroactively apply tax deductions for equipment purchased in a previous year if they did not choose to do so at the time of purchase [13][14]