1, the network server in State Taxation Administration of The People's Republic of China, People's Republic of China (PRC) is abnormal: if the network server in the national tax general network is abnormal, then find a time to log in and have a look;

2. Regarding whether the driver with the qualification certificate runs safely, the operator can inquire through "Check the environment": Do not insert the tax control panel or the tax control panel; When installing the certificate, you need to select the installation package to run as an administrator, then clear the browser cache and reopen the browser;

3. Whether the enterprise accesses the Internet normally: Check whether the enterprise accesses the Internet normally.