Hello tmeyer,

Thanks for connecting with us here. I can see the importance of being able to edit your packing slip and I'll be happy to steer you on the right path so you can continue to manage your business with peace of mind. QuickBooks makes it easy for you to keep track of your transactions with the amazing tools and features offered in the program.

The ability to edit packing slips isn't available in QuickBooks Online. I can see the benefit of having this functionality and I recommend sending feedback to our engineers. You can do this by clicking the Gear icon and looking for Feedback. Your feedback helps us improve the program making it easier for you to use. 

In case you have other questions, don't hesitate to leave them in the comments below. I'll be one message away.