Group 1 - The process for declaring work injury insurance fees for engineering projects involves logging into the social insurance fee management client, adding unit information, and selecting the correct tax registration information [2] - After the construction unit completes the insurance registration and associates the payment information at the tax office, they can access the "Engineering Project Social Insurance Fee Declaration (Self-Service)" menu to query the project information pending declaration [3] - The construction unit can verify the declaration data and submit it after calculating the payable amount from the tax system [4] Group 2 - Once the declaration is completed, the construction unit can check the declared project information in the "Declaration Records" menu [4] - The system displays the declared data, allowing the construction unit to view details, make payments, or void unprocessed declaration data [4] - The social insurance fee management client for construction work injury declaration is a separate module that requires prior registration at the local social security bureau and association at the tax authority [5] Group 3 - In case of data loss due to computer changes or software reinstallation, tax personnel can apply for the "Data Download" function at the tax service hall to retrieve individual income tax data within 72 hours [6] - After logging in, personnel can download previously submitted information by confirming the download prompt [7] - The process includes verifying via SMS and accessing the unit declaration record to download past individual income tax declaration forms [8]

Core Viewpoint - The article provides detailed instructions on how to apply for adjustments to invoice limits, including necessary documentation and steps for both individuals and businesses [3][4]. Group 1: Application Process - The application for adjusting invoice limits requires filling out specific fields such as "Adjustment Limit Type," "Short-term Adjustment Type," "Effective Period," and "Requested Adjustment Amount (in Yuan)" [3]. - Certain fields marked with an asterisk (*) are mandatory for submission [3]. Group 2: Required Documentation - If the cooperating party is an individual, a purchase and sales contract must be uploaded as supporting documentation [3]. - For business entities, additional information such as contract name, goods or services, contract amount, and the taxpayer identification number of the other party must be provided, and the buyer must confirm the contract through the electronic tax bureau [3]. Group 3: Invoice Cancellation Procedures - In cases of sales returns, erroneous invoicing, or service interruptions, the original invoice must be retrieved and marked as "void" before cancellation [8][9]. - Specific conditions for voiding invoices include the return of invoice copies within the same month of issuance, no tax reporting or accounting by the seller, and the buyer not having certified the invoice or having a mismatch in certification results [11]. Group 4: Red-letter Invoices - If a red-letter invoice is needed due to sales returns or errors, the original invoice must be retrieved and marked as "red冲" (red冲 means red cancellation) before issuing the red-letter invoice [12]. - Electronic invoices and certain specialized invoices cannot be voided and must instead be replaced with red-letter invoices [12].

Group 1 - The article discusses the process for adjusting invoice quotas in the national unified electronic tax bureau, highlighting the steps required for taxpayers to submit their applications [4][5][6] - Tax authorities have the discretion to adjust the invoice quotas based on various circumstances deemed necessary during daily management [5][6] - The application process includes logging into the electronic tax bureau, selecting the appropriate options, and providing necessary documentation for the adjustment request [4][5] Group 2 - Specific conditions for voiding invoices are outlined, including scenarios such as sales returns, erroneous invoicing, and service interruptions [14][15] - The article specifies that paper invoices must be marked as "void" and returned in full to be considered voided, while electronic invoices cannot be voided and must be replaced with red invoices [15] - The conditions for voiding invoices include timely return of the invoice, no tax reporting by the seller, and no certification by the buyer [15]