Can anyone advise how to link Quickbooks Online Pro with the Joist app?

The best way to know if a third-party app is already accredited is by visiting the Intuit Marketplace and check if it's already listed.
 

To search for the app that is already accredited, refer to this link: Apps help QuickBooks run better.
 

If no results are found for the app, reach out to the app developer for partnership opportunities.
 

If you have any other questions about app integrations in QuickBooks, let us know in the comments below.