handoff and entering information into menus

macOS and Mac Apps

hi all, I have one question, when dialing into a phone menu system and using handoff in mojave, how in the world do i access the keyboard so i can enter information into the menu tree? I selected audio and it comes up saying using your iphone, and all I have is mute end, and the other things that go along with that, so how do i access the keyboard when in that call to enter in the information to a menu system?