As a user, I have always understood that the conversion was from same year to same year, i.e. 2018 UT should become 2018 Lacerte. Do you have the 2018 Lacerte installed? Yes, a call to support is a good idea. I believe they are available today. https://proconnect.intuit.com/community/help-articles/help/how-to-contact-lacerte-for-help/00/4691