I want to connect to QB data with API. And I want to use this data on Looker Studio.When I want to have access I'll face error without explanation.I'm in Dubai.

The error you encounter occurs if the app is accessed with an incorrect token or a redirected URL configuration, Abhijith.

Website redirection allows a web page to be accessed through multiple URL addresses. When the redirection occurs, an invalid or incorrect token often follows due to expired session.

I recommend reposting this query in the Intuit Developer's Community, where API integration issues are addressed by engineers or personnel with expertise in third-party applications, particularly if you are developing an app for QuickBooks Online.

1. Go to this link: https://help.developer.intuit.com/s/.
2. Choose the QuickBooks Online tile.
3. Click Ask as Question on the right.
4. Log in to your Intuit account and enter your query.

Moreover, you can pull up reports and customize them in QuickBooks Online according to the data you need.

You can keep us updated on this thread so we can assist you further in managing your QuickBooks Online data.