You can go to https://apps.intuit.com to check for the list of supported apps in QuickBooks Online (QBO). Another way is to sign in to your QBO account and click Apps on the left pane.
Otherwise, you can call Wintac support to to see if this app can be integrated in QBO.
Feel free to let us know if you have any other questions. We'll make sure to get back to you.
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