收到税务局发来的短信，不可直接忽略，必须完成以下三步！

Group 1 - The article discusses the methods for querying unreported tax matters through the electronic tax bureau, emphasizing the importance of self-checking tax declarations [4][5][6] - It outlines four scenarios regarding the self-check results of tax declarations, including completed checks with no issues, checks with unresolved discrepancies, and situations where self-checks have not been completed [6][7] - The article provides guidance on how to handle unqualified invoices and the necessary documentation required for tax deductions, including internal and external vouchers [13][15][18] Group 2 - It explains the process for companies to rectify issues related to unqualified invoices, including the need to obtain valid invoices before the annual tax settlement period ends [15][22] - The article highlights the time frame for obtaining tax deduction vouchers, stating that they should be acquired before the end of the annual corporate income tax settlement period [22][23] - It references the regulatory framework governing tax deduction vouchers, specifically the announcement by the State Administration of Taxation regarding the management of corporate income tax deduction vouchers [23]