I want to connect a workflow system (n8n) with QuickBooks API. n8n asked for Client ID and Client Secret key, which I provided. But the app doesn't connect.

Thank you for the detailed information, @ibutt. I appreciate your patience as you work through the invalid redirect_uri error, which typically indicates that the redirect URL specified in your application's settings doesn't match the one registered in your Intuit Developer account.

To help you connect a workflow system (n8n) with QuickBooks API, I recommend contacting our Intuit Developer Support Team. They can help diagnose and fix the API error messages you've received.

Here's how to connect with them:

1. Go to this link: https://help.developer.intuit.com/s/
2. Choose your QuickBooks product.
3. Click Ask a Question.
4. Sign in, then follow the onscreen pop-ups to proceed.

After successfully connecting, if you need financial reports, provide a quick overview of your business. In QuickBooks Online, you can run basic financial reports that help you track your business performance and make informed decisions.

If you have any other questions or concerns about the error you're getting, feel free to drop by and let me know so we can help you out.