Does anyone know why the "packing slip" option is grayed out and unusable? It was working yesterday.

Hi there, userbethani. Thanks for posting in the Community and bringing this concern to our attention.

We have received reports from other users having the same issue about the packing slip option being grayed out. And our product engineers are investigating the root cause and implementing a fix. While they do, I suggest contacting our Support Team to include you in the list of affected users. Once they add you, expect an email from our engineers for updates. 

To reach them, click the ? Help button at the top-right corner and select Contact Us to talk with a live agent. Ensure to review their support hours to know when agents are available.

In the meantime, you can browse and use the below links in the future when managing and navigating your QuickBooks account.

•  Video Tutorials for QuickBooks Online - You can watch videos that can help you perform the most vital features of the program. 
• Small Business Webinars and Trainings - Join our live QuickBooks webinars for more in-depth knowledge on how you can maximize the use of QuickBooks to manage your finances.

Don't hesitate to let me know if there's anything else I can do to help. I'm always here to assist. Have a nice day.