Convert your 2019 ProSeries files to Lacerte https://proconnect.intuit.com/community/convert-data-files/help/proseries-backup-instructions-for-da...

Then do the organizers from 2019 Lacerte. 

Review the returns for accuracy, especially depreciation and carryovers, then proforma from 2019 to 2020. There is a checkbox in screen 3 at the end of the first section. REMOVE the check mark after your review and before you do the proforma. 

Lacerte provides a little more support for new users. 

FYI - You posted in the wrong spot, this is for forum improvement. Start here https://proconnect.intuit.com/community/ and select the product you need help with.