The former does not need a ca key, and it can be declared online by direct registration and login, while the latter needs to use ca login to declare.
If an ordinary user is not registered or logged in with ca, and the system cannot identify the user, it shows that the user does not exist. Conversely, if the ca user logs in directly without a key, the system cannot identify the user.
What kind of taxpayer is classified is set by the local tax administrator on the tax intranet. If you used to be a ca user, the administrator didn't set you as a ca user when the system was upgraded, the phenomenon you mentioned will appear. For example, you can use ca to declare normally last month, but you can't this month. It's also because the administrator didn't set you as a ca user when resetting, because the system was newly launched, and some users' reports were incomplete. The administrator had to go online to modify and didn't have your password, so he had to reinitialize it, and then he didn't restore your ca user settings.
Solution: Call the administrator to reset.