Hello user61405,
The Sync with Square app was recently replaced with Connect to Square. If you're ready to start using Connect with Square app, you'll have to disconnect the old Square app and connect to the new one.
To disconnect the Sync with Square app:
- Log in to QuickBooks Online, and click on the Apps tab.
- Click on My Apps, under the Sync Square card, select Actions, and click on Disconnect.
- In the pop-up message, select Confirm disconnect.
And then, set up the Connect to Square app by searching it in the Apps tab. You can check this link to learn more about the new Square app connection in QuickBooks Online Connect your Square account to QuickBooks Online.
Post again in the Community if you have more questions. I'll be around to help you.
