Error while sending the Purchases to QBO via API

Are you developing your own application to integrate with QBO or using a third party connector to send PO data?

Let me route you to the right support to help you send the purchases to QuickBooks Online via API, harshil_patel.

I know where you can find solutions to API-related questions. We have a dedicated Intuit Developer forum. Just go to our website to discuss this with our Developers Team as well as other third-party app developers, QuickBooks users, and other third-party application users that might be able to share their experiences regarding your concern. Here's how: 

1. Go to this link: https://help.developer.intuit.com/s/.
2. Select QuickBooks Online and click the Ask a Question button.
3. Enter the details of your concern just like how you did on the Community page.
4. Click Ask.

The API Docs and Tools are also available at the top of the page. Just make sure you provide the necessary information to access your app's production data. Feel free to browse this reference if you have any QuickBooks-related concerns. It contains all of the program’s topics and articles: View all help.

If you have any additional QuickBooks-related concerns, feel free to click the REPLY button below. I'm more than willing to assist you again to improve your experience here in QuickBooks. Take care and have a good one!