online certification process of special VAT invoice (Qingdao) 1. Insert the tax control panel into the computer host, click the billing software icon to log in, then click "Help" to log in to the VAT invoice integrated service platform, and confirm 2. Enter the certificate password to log in and enter the VAT invoice integrated service platform (Qingdao) 3. Check the deduction-check the invoice deduction-click in, select the date range according to the date when the invoice needs to be checked, and click. According to personal habits, you can also inquire according to the taxpayer identification number. Check the invoice according to the invoice and click Submit to complete the authentication. At the end of the month, just click Deduction Check-Deduction Check Statistics-Application Statistics-Confirmation-Print.