How to create a "department name" field and a "contact name" field

Hello,

We have added text tags for signatures, signer names, dates, and signer titles, and would now like to add required fields for Accounts Payable information: department name, contact name, contact e-mail, invoice submission e-mail, and contact phone number.  The Accounts Payable contact person will be a different person than the signer.

Thanks for your help!