It's pretty crazy that a platform as big as Shopify have not added this feature yet. Not to mention how much time this 1 feature would help save USPS workers everywhere considering how many people use Shopify. Although I would imagine bigger companies have had to switch to a third party shipping provider by now to get around this issue.
Double check your shipping rates with the third party app. We have been using Shipstation and I found out that priority mail is sometimes $2 more on shipstation vs shopify. Also I have found NO ONE that can beat shopify UPS rates. They are 7-8 dollars less than shipstation. Shopify REALLY.. REALLY needs to upgrade their shipping features. I need to be able to print pick list or packing lists at one time for all the order as well as print the end of day form.
PLEASE PLEASE PLEASE help us out. At least you can do that since you took away our phone support LOL.
I have a workaround that's not perfect but better than getting yelled at when dropping off packages.
I use a Dymo 4XL to print the labels. I print them from the tab as normal, but I also do a second printing to my office printer, using the "More Settings" under print, and do 6 pages per sheet, double sided, at 136% scale. This creates a stack of paper with bar codes that I can just hand to the USPS staff to scan manually. It's not the tidy End of Day form that shipstation creates (I use them for a different order process outside of shopify), but it works.