Thank you for stopping by the community and posting your first question. The data conversion is done through the current year tax program (Lacerte 2019). If you try to convert through any other version, the Client Data Conversion will be grayed out. Please see this knowledge base for more information about the Conversion Wizard:

About the Tax Data Conversion Wizard

https://proconnect.intuit.com/community/help-articles/help/about-the-tax-data-conversion-wizard/00/5...