Personal income tax app. There is a method to apply for a tax refund in the personal income tax app. The specific operations are as follows: 1. First open the mobile personal income tax app, click on "Annual Comprehensive Income Summary" in "Common Businesses" on the homepage, and select "Fill in using declared data". 2. After confirming "Start Declaration", the system prompts "Standard Declaration Instructions (Using Declared Data)", click "I have read and understand" to start the annual final declaration. 3. Then follow the process to confirm the information. Here you need to confirm the basic personal information, remittance place, and the amount of tax paid. After confirming the information, click "Next" at the bottom. 4. Finally, the "Apply for Tax Refund" interface will appear. Click "Apply for Tax Refund".