I want to fetch transacion history based on PO Number, I have attached screenshot as well

Hello there, @staherzama.

I'll ensure you'll receive the help you need to fix the error you received when fetching transaction history.

This error occurs when your application sends information that QuickBooks can't recognize. This might happen because of an unsupported special character or a field that exceeds QuickBooks' character limitations.

In this case, I'd recommend contacting your application provider to notify them about the error. They can assist you further on how you can overcome the issue to help you get back to business.

On the other hand, you can also post your queries on the Intuit Developer Support page to seek further assistance regarding your concerns.

Moreover, I'll leave this material to guide you in dealing with the different errors when using web connectors: Fix common Web Connector errors in QuickBooks Desktop.

Don't hesitate to reach us if you have further questions or clarification about fetching transaction history in QuickBooks Desktop. We're always here to assist you.

I am part of Mekdam Holding Group(https://www.mekdamholding.com/), we had bought the license from US Website.

We dont have any specific person assigned to us, kindly let me know how to proceed further.

I understand the importance of fetching transaction history in QuickBooks Desktop (QBDT), @staherzama.

However, to ensure that your concern is addressed properly, I suggest reaching out to our Intuit Developer Support once again. They have the expertise and knowledge to provide you with the most suitable steps necessary to resolve your issue. Please don't hesitate to contact them for assistance.

Additionally, I'm adding this helpful article as your reference in managing, deleting, or transferring your connected apps: Manage connected apps in Web Connector.

Come back to this post if you have further concerns or follow-up questions about fetching transaction history in QBDT.