Looking for the MO statue on wiretapping laws. Does MO follow federal guidelines or adapted its own. Thanks!

It's under RSMo 542 - Missouri is a one-party consent state.

So does that mean that we just know we are recording and dont have to disclose to the customer that the call may be recorded?

Yes, as long as you are a party to the conversation.
2. It is not unlawful under the provisions of sections 542.400 to 542.422:

(1) For an operator of a switchboard, or an officer, employee, or agent of any communication common carrier, whose facilities are used in the transmission of a wire communication, to intercept, disclose, or use that communication in the normal course of his employment while engaged in any activity which is a necessary incident to the rendition of his service or to the protection of the rights or property of the carrier of such communication, however, communication common carriers shall not utilize service observing or random monitoring except for mechanical or service quality control checks;

(2) For a person acting under law to intercept a wire or oral communication, where such person is a party to the communication or where one of the parties to the communication has given prior consent to such interception;

(3) For a person not acting under law to intercept a wire communication where such person is a party to the communication or where one of the parties to the communication has given prior consent to such interception unless such communication is intercepted for the purpose of committing any criminal or tortious act.

Thanks so much!