I believe you have to send the file to Lacerte, then *they* convert it & return it to you.
And I'm not 100% sure that Lacerte can/will convert TurdoTax files like ProSeries does.
If a post answers your question, click on *Accept as solution* for future searches
See this article for how to use the Conversion Wizard to submit data files to Intuit: https://accountants-community.intuit.com/articles/1862053-about-the-tax-data-conversion-wizard
See this article for details of what will be converted from TurboTax data files: https://accountants-community.intuit.com/articles/1860958-turbotax-to-lacerte-converted-items
Still an AllStar