Where do you do the work? If in CA, no, you don't owe MO tax. But if you are physically in MO when you do the work, then yes, you would need to file a non-resident return for the income you earned while in the state of MO. But there are exceptions.
See Filing nonresident returns for remote work
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
