Screen 1 > Miscellaneous Info > Select the Preparer > For Prepared by select Non-Paid Preparer
You do have to add the preparer, including PTIN in Settings > Options > Preparers
The issue of Non-Paid Preparer is discussed here https://proconnect.intuit.com/community/lacerte-tax-discussions/discussion/when-to-use-non-paid-prep...
Answers are easy. Questions are hard!
