Thanks again itonewbie:)

No, I'm not trying to generate a Rent Certificate. We have one, but ProConnect is not asking for the inputs on the Certificate.  Here's the error message.

When Wisconsin Schedule H is included in the electronic return, the Property Tax Bill or Rent Certificate information must be completed in the "Wisconsin Other Credits" Screen.

Unfortunately, ProConnect inputs do not coincide with the Rent Certificate information.  I'm thinking I'll get property tax info, and see if that clears the error & permits e-file -- anticipating the State will follow up with a request for the Rent Certificate, which we can US mail upon request (or maybe I can attach to the filing -?).

Thanks again!