1, the tax digital certificate password has been forgotten, and the corresponding certificate password can be found after keypwd. The specific operation is as follows: through the billing software, find and open the software properties, right-click the icon of VAT invoice billing software, open the properties, and click the location of open file.

2. Generally speaking, if you forget the tax ukey password, log in with the initial password of 8888888. If you can't access the system, contact the local tax bureau to reset the password. After unlocking, enter the system to convert the old and new passwords, and keep the passwords properly.

3. If the taxpayer forgets three passwords or tax Ukey is locked, he must contact the tax bureau to reset it. VAT invoice software (tax Ukey version) has three passwords, namely tax Ukey password, digital certificate password and administrator login password.