Hi derby46a,
You can't reference a checkbox's state via field coding - a macro would be required. An alternative, that doesn't require macro coding, is to use a dropdown formfield with Yes/No options (or even checked/unchecked wingding characters). You can then test the dropdown formfield's state and vary the output accordingly.
To see how to do a wide range of calculations in Word, check out my
Microsoft Word Field Maths Tutorial:
https://www.msofficeforums.com/word/...-tutorial.html