Can I revert from online?

QBO US version to QB Desktop US version?

Visit the following reference

https:// quickbooks.intuit.com/learn-support/en-us/help-article/import-export-data-files/export-convert-quickbooks-online-data-quickbooks/L0tKtLwhn_US_en_US

Utilize the trial license for QBD 2021 Pro to proceed. You can still purchase the one time license for QBD 2021 Pro/Premier from several partners.