Need Technical Support on creating invoice through api provided in docs, facing an issue after creating invoice billable status is not getting updated to" hasbeenbilled"

Let me direct you to the right support to help you update billable invoices through API, Sriram.

You'll want to reach out to our developers team. They're more knowledgeable in terms of technical aspects and more familiar with performing tasks such as designing, building, integrating, and testing product backlog items in a more functional way.  To do so, follow the steps below:
 

1. Go to the Intuit Developer Support website.
2. Choose your QuickBooks Product.
3. Select the Ask a Question option.
4. When prompted to sign in, log in to your Intuit account.
5. Enter a short description of your concern and click Ask.
    

Furthermore, learn how you can keep track of your books accurately using financial reports. To know more, check out this article for more details: Use Reports to Track Cash Flow in QuickBooks Online.

Let us know if you have any questions about billable invoices or if you have any other concerns about QuickBooks. We're always here to help you all the time.