Hi there, schmidtfs.
I appreciate you taking the time to visit the Community. I'd be happy to provide some info on your question about an app for Square.
To view available applications for QuickBooks Online:
1. Click the Apps tab in the left navigation bar.
2. Search for Square.
Here you'll find several apps to choose from. I'm unable to recommend which would work best for your client's store but they'll be able to view all of the specifics for each application from this page. These can also be accessed by following this link: https://apps.intuit.com/app/apps/home.
Additionally, this article provides details about syncing with Square: https://quickbooks.intuit.com/community/Apps/Sync-with-Square-Hub/m-p/185730.
Keep up the great work and please let me know if you have any questions.
