Thank you for reaching out to us with your concern, @mikeshick.

I'm here to share insights and ensure you can send your sales forms in QuickBooks. 

The problem with sending emails through QuickBooks 2020 on your computer is due to the software being outdated. As software ages, it encounters compatibility issues with newer systems or programs, which could cause the intermittent problem you're facing.

Thus, upgrading to a newer version of QuickBooks can provide a more stable and reliable solution for your email-sending needs. For detailed steps, you can check out this article: Upgrade QuickBooks Desktop Pro, Premier, or Enterprise.

Alternatively, you can also download the invoice as PDFs and send it outside QuickBooks.

Additionally, you can personalize your email templates when sending forms to your customers. For step-by-step instructions, refer to this article: Create custom email templates in QuickBooks Desktop.

If you encounter further questions about sending emails in QuickBooks Desktop, please don't hesitate to reach out. I'm here to help and ensure your QuickBooks experience is as smooth as possible.