出差的飞机票、火车票需要用于抵扣，应如何开具电子发票？操作步骤

Group 1 - The article discusses the process of issuing electronic invoices for railway and airline tickets, emphasizing the need for accurate information for tax deduction purposes [3][5][12] - For railway electronic tickets, users can access the 12306 App to manage and issue invoices, with options for single or batch processing [4][5] - For airline electronic tickets, travelers can request invoices within 180 days after their journey, and the airlines must provide the invoices based on the provided information [12][6] Group 2 - The article highlights the importance of including the buyer's name and unified social credit code when issuing invoices for tax deductions [3][5] - It outlines the steps for both railway and airline electronic ticket invoice issuance, ensuring compliance with tax regulations [5][12] - The article notes that international and Hong Kong-Macau-Taiwan flights currently do not support electronic invoice issuance [12]