Utilize the trial license of QBD 2021 for free

https:// quickbooks.intuit.com/learn-support/en-us/new-subscriptions/download-a-trial-of-quickbooks-desktop/01/185974#M3533

You can utilize it migrating your data to a new blank QBO account if required.

https:// quickbooks.grsm.io/US
https:// quickbooks.grsm.io/us-promo