一图了解：数电发票如何开具蓝字发票？

Core Points - The article discusses the automatic invoicing system for taxpayers, detailing the rules for automatic tagging, content assistance, and information verification [3][4][5]. Group 1: Automatic Invoicing System - Taxpayers can select invoice types, specific business scenarios, and tax methods, after which the system automatically adds relevant tags [3]. - The electronic invoice service platform provides corresponding digital invoice styles based on the taxpayer's business context [3]. Group 2: Content Assistance Rules - The content assistance rules for blue invoices include: - Intelligent matching of product codes based on the project name entered by the taxpayer [3]. - Automatic adaptation of tax rates according to the selected goods and services tax classification codes [3]. Group 3: Information Verification Rules - The verification rules for blue invoices consist of: - Error verification rules to check discrepancies in amounts and required fields [3]. - Compliance verification rules to ensure the correctness of the invoice information and data legality [3]. - Business verification rules that check applicable tax rates and the validity of the invoice information [3]. Group 4: Special Business Rules - For motor vehicle transactions, the system automatically fills in vehicle identification details and performs compliance checks against electronic information [3]. - The system monitors for low vehicle pricing, violations, and anomalies in compliance certificates, automatically blocking invoicing if conditions are met [3].