The default password (initial password) of the tax digital certificate is 88888888, which is eight eights. After the initial installation of the invoicing software, you must modify the default password of the tax digital certificate before you can log in to the invoicing software. After the default password for the tax digital certificate is entered for the initial login to the invoicing software, there is no need to enter it again for subsequent logins. Once you forget it, you need to go to the tax authority to reset the default password.

A tax digital certificate is an authoritative electronic document issued by a third-party electronic certification agency (CA center) licensed by the national information and cryptography authorities. It is a series of data that marks the identity information of tax authorities and taxpayers on the Internet. It is used to identify and authenticate the identities of communicating parties in Internet communications.