For your reference

https:// quickbooks.intuit.com/learn-support/en-us/manage-intuit-account/what-is-camps-and-how-do-i-use-it/00/185869

Afaik, QB Desktop US Pro Plus is not available for monthly subscription. Are you using QB Desktop CA or UK version? If you are using QB Desktop CA version, you can still purchase a one time license of QB Desktop 2021 Pro.