Thanks very much for this itonewbie.   Unfortunately, I've been through the WI "Renter & Property Tax" and "Homestead" Credit inputs too many times. 

While ProConnect creates an error message requiring a Rent Certificate (or property tax bill) with a Schedule H, it does not ask the appropriate questions to generate a Rent Certificate (such as:  Name & Address of Landlord, monthly rent paid, is this a nursing home, etc.) 

I'm working on a 2018 return - hopefully  2019 is better.

Thanks again - I appreciate the assist!