We haven't received similar cases about this matter, so I appreciate you all for reporting your observations regarding the unusual behavior you encountered while working with estimates and invoices. These insights are essential for diagnosing the underlying issues effectively. I'm here to ensure you can continue your tasks without interruption.

Bodhi and SConstruction, I appreciate your efforts in using a different browser to resolve the issue. For JCDLO, Katrina, and Karl, let's take some troubleshooting procedures by opening your account and creating an entry through an incognito window to rule out the possibility of a webpage issue.

Here are the following keyboard shortcuts to use: 

• Google Chrome and Microsoft Edge: Ctrl+ Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Safari: Command + Option + P
   

Once it works, return to your regular browser and clear your cache to start afresh. Accumulated cache and cookies in the system can become outdated or corrupted, leading to unexpected behaviors. If the issue remains, you can switch to other installed supported browsers, which is a good alternative.

If the issue persists after completing the troubleshooting steps, I recommend contacting  QuickBooks live support. Our team of experts can arrange a screen-sharing session to help identify the reason behind the prompts for signing in while managing your estimates and invoices. Additionally, they can open a ticket to investigate this issue further.

Here's how to contact our live support team:

1. Open your QuickBooks account using your web browser.
2. Head to the Help icon, then the Search tab.
3. Enter Contact US in the search box.
4. Click Contact Us.
5. Pick the Chat or Callback option.
    

Please note that our support hours are Monday through Friday, 6 AM to 6 PM PT. We are also open on Saturdays from 6 AM to 3 PM PT. During these times, you can contact our expert team for successful communication.

Moreover, here are some resources as a guide in handling your sales forms in QuickBooks Online:

• Customize invoices, estimates, and sales receipts
• Convert your estimate to an invoice
• Add, customize, or remove logos on sales forms

Rest assured, our live support team is ready to investigate the unusual sign-in prompts you're experiencing. As you move through this process, remember that I'm here as a resource for any questions or additional support you may require.