Afaik, it doesn't support QuickBooks and we have yet to find any 3rd party connector for such purpose. If you still prefer to use QB Online, consider having a 3rd party free invoicing app with e-invoicing feature for India companies and a 3rd party connector to mirror the data back into your QBO.
Welcome, and thanks for dropping by the Community. I'm here to share information about integrating API in QuickBooks Online (QBO).
For connecting or integrating API requests using your QBO, I recommend reaching out to our Intuit Developers forum. From there, many programmers, developers, and QBO experts can further assist you.
Here's how to visit them:
In case you need it, I'll add this article that tackles managing invoices in QBO: Create invoices in QuickBooks Online.
For more tips and other resources, I recommend visiting our website for future reference: Self-help articles.
Feel free to let me know if you have more questions about invoices or anything else QuickBooks. I'll be more than happy to answer them. Take care always.