Greenback is currently supported on all QuickBooks Online small business editions including Simple Start, Essentials, Plus and Advanced.
None of the QuickBooks Freelancer editions, including Self Employed support third party app integrations, therefore they cannot supported by Greenback.
Greenback does not support QuickBooks Desktop at this time. However, this integration is currently in the works and will be supported soon in an upcoming roadmap update.
Once released, support for QuickBooks Desktop will likely include the following variations: Pro/Premier/Premier Plus/Enterprise (Standard, Contractor, Manufacturing & Wholesale, Nonprofit, Retail, Professional Services, Accountant), and QuickBooks Desktop Accountant.
Greenback does support the QuickBooks Online Desktop App for Windows or Mac. Learn more here
QuickBooks Desktop users will still find value in Greenback's full text search, CSV downloads, and automatic fetching for tax compliance.
QuickBooks Point of Sale is a variation of QuickBooks Desktop and is currently not supported by Greenback at this time.