Third-party IntegrationΒΆ Integrating Vietnamese E-invoices Viettel S-invoice Module Installation Integration Configuration Step 1: E-invoice Service Step 2: Declaration of Serial/Template/Type of E-invoice Declaration of E-invoice Type Declaration of E-invoice Template Declaration of E-invoice Serial Step 3: Configuration on Customer Invoice Journal Issuing E-invoice Step 1: Confirm Draft Invoice Step 2: Create and Sign E-invoice Step 3: Download E-invoice Step 4: Send the Invoice to the Customer Adjusting Reduced E-invoice Canceling Issued E-invoice Step 1: Cancel the Issued E-invoice Step 2: Cancel the invoice on the internal system Synchronize E-invoice Status Bkav Ehoadon Module Installation Integration Configuration Step 1: E-invoice Service Step 2: Declaration of Serial/Template/Type of E-invoice Declaration of E-invoice Type Declaration of E-invoice Template Declaration of E-invoice Serial Step 3: Configuration on Customer Invoice Journal Issuing E-invoice Step 1: Confirm Draft Invoice Step 2: Create E-invoice in Pending Status Step 3: Sign and Issue E-invoice Step 4: Download E-invoice Step 5: Send the Invoice to the Customer Adjusting Reduced E-invoice Canceling Issued E-invoice Step 1: Cancel the Issued E-invoice Step 2: Cancel the invoice on the internal system Synchronize E-invoice Status VNPT VN-invoice Module Installation Integration Configuration Step 1: E-invoice Service Step 2: Declaration of Serial/Template/Type of E-invoice Declaration of E-invoice Type Declaration of E-invoice Template Declaration of E-invoice Serial Step 3: Configuration on Customer Invoice Journal Issuing E-invoice Step 1: Confirm Draft Invoice Step 2: Create and Sign E-invoice Step 3: Download E-invoice Step 4: Send the Invoice to the Customer Adjusting Reduced E-invoice Canceling Issued E-invoice Step 1: Cancel the Issued E-invoice Step 2: Cancel the invoice on the internal system Synchronize E-invoice Status Zalo Zalo OA Setup Account Zalo Application Zalo Application Setup Zalo OA User Guide