I've been told and have read that you cannot go back to an older version of Quickbooks.  They are not backward compatible.  So how do you accomplish this "switch to old QB Desktop with a non-subscription license"?  Will the work done in QBDT Pro Plus 2024 all transfer over to QBDT 2021?  

I spoke with Intuit today and asked if I do not renew, what access would I have to my data?  I would lose functionality because updates would stop but the rep said I would be able to add transactions and run reports as usual, for as long as I wanted. From this forum and others, that if not renewing, it would become data-view only for one year.  So I'm confused at the discrepancy.  Which is correct?  Are the reps giving out false information?