Core Viewpoint - The article discusses the management and implications of abnormal VAT deduction certificates, particularly in cases involving businesses that have gone missing or are untraceable, highlighting the criteria for identifying such certificates and the procedures for handling them [14]. Group 1: Abnormal VAT Deduction Certificates - Abnormal VAT deduction certificates are identified when the input tax amount exceeds 70% of the total input tax for the same period [5]. - If the cumulative input tax amount from abnormal certificates exceeds 50,000 yuan, it is flagged for further scrutiny [6]. - Businesses that fail to file tax returns or submit false declarations may have their VAT deduction certificates classified as abnormal [5][6]. Group 2: Handling Abnormal Certificates - Taxpayers with abnormal certificates that have not yet been declared for deduction or export tax refunds are not allowed to include these amounts in their calculations [8]. - For taxpayers who have already declared deductions, there are specific procedures to follow, including the potential recovery of any refunded tax amounts [9]. - Taxpayers classified as A-level credit can submit verification requests to the tax authority within 10 working days of receiving a notification regarding abnormal certificates [12]. Group 3: Policy References - The article references two key policy documents from the State Administration of Taxation that outline the management of abnormal VAT deduction certificates and the treatment of invoices issued by missing enterprises [14].