1. The enterprise first downloads and installs the tax Ukey version of the VAT invoice issuance software on the official website of the tax bureau. 2. Connect the tax Ukey to the computer and start the tax Ukey version of the VAT invoice issuance software. You need to enter the Ukey password 88888888 when starting it for the first time. 3. Enter the initialization settings page, set the login password, and click Next. 4. Set the company’s tax information and click Next. 5. Complete parameter settings and click Next. 6. After the initialization setting is completed, the system pops up the login page. After entering the login password, click Login to enter the system. The enterprise can start to use the VAT invoice issuance software normally.