Add a checkbox in checkout and display value in Invoice
 

Hi I want to add a checkbox in the checkout and based on its value want to display yes/no in the invoice

Alternatively, if I am able to use the value of the mailchimp checkbox to show yes or no in the invoice; that will solve the problem too.

I added this checkbox under the customer notes section:
<input type="checkbox" id="vehicle1" name="vehicle1" value="Bike">
<label for="vehicle1"> Become a member</label><br>

Thanks and Regrads,
Siddharth Puri