Provide message on statement via API

Hello, Phil Situmorang.

I understand that you're looking to enter a message on a statement in QuickBooks Online. Don't worry; I can help guide you to the best support available to ensure you get the assistance you need. 

If you want to synchronize QuickBooks with other business applications, you may want to check out the Intuit Developer's Center. They can expertly guide you through the QuickBooks API connectivity process, enabling you to integrate your platform and streamline your business procedures. 

To do so, please log in or create a new account on our Intuit Developer's website. Our team of developers will be happy to assist you and respond to any queries you may have. We are dedicated to providing you with the best possible support and ensuring that your experience with our website is as seamless as possible.  

1. In your browser, enter this link: https://help.developer.intuit.com/s/
2. Choose your QuickBooks product.
3. Select the Ask a Question option.
4. Press Sign In.
5. Use your Intuit login credentials.

I've also included a couple of detailed resources about working with APIs which may come in handy moving forward:
 

• API Reference
• Develop your app
• What you can do with the QuickBooks Online Accounting API

Let me know if you need further assistance with API. We're always here to help you. Have a great day!