I've looked into the new Safe Harbor Elections that you are referencing.
To get the calculation to work in ProSeries you would simply fill out the Qualified Business Income Deduction Info Smart Worksheet at the bottom of your Schedule E Worksheet.
If the IRS needs an election statement to go with it, this election statement has not been added to ProSeries 2018 so it would need to be added on the Preparer Notes worksheet or via a PDF Attachment.
https://accountants-community.intuit.com/articles/1605889-individual-using-preparer-notes-for-e-file... shows you how to use the Preparer Notes.
https://accountants-community.intuit.com/articles/1606302-attaching-pdf-files-to-federal-or-state-in... shows you how to add a PDF attachment to the return.
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Yes, we will be adding a Section 199A Trade or Business Safe Harbor Statement for Rental Real Estate (pursuant to Notice 2019-07) to all 3 products (ProSeries, Lacerte, ProConnect Tax Online). You can print the statement for the taxpayer signature then attach as a PDF to e-file with the return. We expect the statement to be added in the next week.
I have aggregated several properties and Lacerte creates a Sec199A Renatal Real Estate safe harbor statement for each rental property. I would think if we did an aggregation that the statement should list all aggregated properties on one statement not individual statements
In Forms view in Lacerte, you would be able to print the election to a PDF and then attach it to the return. In Lacerte if you were to type in the upper right "PDF attachment" it would bring up this knowledge base for you:
Attaching PDF Documents to an E-file Return
I was expecting to find the statement to attach to the return by going Forms\look up 199A. It was not clear to me that checking off that box BELOW the A - Is this a qualified trade or businees, that I had to check off the next box "This rental qualified as abusiness under safe harbor 2019-07, AND BY CHECKING THIS OFF, the statement gets automatically generated... This is slightly a diferent approach to adding statements, which was not clear to me. Thanks so much!