Welcome to the Community, @barronarts. Let's find out why this is happening, so we can fix the issue.
But before we start, I need more information to help me get on the same page. Would you mind telling me more about it? Like, what specific error coded when trying to duplicate older invoices into new invoices and send to clients.? This way, I can provide you with an accurate resolution.
In the meantime, I know you've already contacted our support team. However, I would still suggest you get in touch with them again. They have the tools to check your account and can share updates on the case opened.
You can contact our Support team by following these steps:
- In your QuickBooks Online account, click Help (?).
- Choose the Search tab, then select Contact Us.
- Determine how you would like to connect with an expert: Start a chat or Get a callback.
Please also observe their support hours to ensure you can reach them at your most convenient time.
On the other hand, you can scan these resources for guidance about managing invoices and estimates:
I'm always here if you have additional questions about managing your invoices in QBO. Let me know in the Reply section below. Have nice day ahead!
