Adding a 1094C form manually

I am trying to add a 1094C form manually for a group of employees that are paid from an external payroll vendor.  When I try to create the form, I cannot enter the number of associated authoritative transmittal or 1095C forms in Part I and Part II.  The fields are 'grayed' out.  I am submitting 6 other 1094C forms for employees in the JDE payroll.  Each 1094C has a separate EIN.  The 1095C forms for the company with the external payroll vendor are included in the 1095C workfiles under the correct EIN.  The company is also setup as an ALE.