Core Viewpoint - The article emphasizes the importance of updating housing rental tax deduction information in the personal income tax app, especially after changes in rental contracts or work locations [2]. Group 1: Updating Rental Information - Users should confirm the accuracy of previously submitted housing rental tax deduction information, particularly the start and end dates of rental agreements [2]. - If a new rental contract is signed after the termination of a previous one, it is crucial to ensure that the information is updated correctly in the app [2]. Group 2: Steps for Adding or Modifying Information - To add new rental information, users must log into the personal income tax app, navigate to "Special Additional Deductions," and select "Housing Rent" [4][5]. - For modifications, users can find the relevant entry in "Filing Records" and click "Modify" to update the necessary details [10]. Group 3: Special Considerations - If there are multiple rental agreements within a year, each record must be added separately to avoid overlapping rental periods [11]. - When changing work cities, users need to update the "Work City Information" section accordingly [11].