Hi there,

eSignature doesn't automatically attach the documents for business returns like it does for a 1040. So you would need to go to File Return, hit View/Print eSig Docs (or use partial print to select the documents you want to include), and save them as a PDF to your computer.

Then on File Return, you can click Client Authorization eSignature on the left, and press the Add documents button. 

Full instructions here under ProConnect Tax: https://proconnect.intuit.com/community/manage-integrations/help/using-esignature-with-business-retu...