You have inadvertently activated it by entering a carryover credit for that or have entered a New Employment credit recapture.
Review the TT/Calif screen Take a look at California credits and taxes, at the top or under Credit recapture, does New Employment Credit Recapture have a $$ entry? If so, delete it.
If that's not it then it must be the carryover. On that same screen, under Business and investment credits is California Credit Carryovers. Go down that path and see if you entered a New Employment credit carryover $$, and if so, delete it.
You can then delete the Form 3554. Here is how to delete a state in TT Online:
https://ttlc.intuit.com/questions/1900608-how-do-i-delete-my-state-in-turbotax-online
