Group 1 - Taxpayers approved under policy regulations can enjoy tax reductions and exemptions, and they can apply for refunds of previously paid taxes through the electronic tax bureau [2] - To initiate the refund process, taxpayers need to log into the electronic tax bureau and navigate to the "One-stop Tax Refund" section [3] - The system will automatically pre-fill basic information in the "Overpayment Confirmation" interface, allowing users to input tax invoice numbers and relevant tax periods [6][10] Group 2 - Taxpayers must select the data for which they wish to apply for a refund and input the refund amount, with the system calculating the total refund amount automatically [9] - After confirming the refund application details, taxpayers can upload necessary documents and submit the application for review [12][14] - Once the application is submitted successfully, taxpayers will receive a notification that their application has been accepted and can track the review progress [14]