Hello there, @jhendrixent.
I'd be glad to provide some information about importing data in QuickBooks Desktop (QBDT) 2020.
Yes, you can import data in QBDT 2020 even if this is no longer supported version. Only the add-on services (QBDT Payroll services, Live Support, Online Backup, Online Banking) will be discontinued.
Furthermore, I'm attaching this article that you can utilize in case you need to import some data to your QBDT: Import and export data in QuickBooks Desktop.
Additionally, you'll want to create a backup copy of your company file before you upgrade it to a newer version of QBDT. This way, you can still access your file in your older version of QBDT.
You can always count on me if you need more help with your company files or with QBDT. Keep me posted by tagging me in your reply. Keep safe and have a good one!
