This was indeed a really good feature. This is in place now. You can edit your packing slip. For this, => Login and go to 'My Account > Sold'. => Click on 'More Actions > Print Packing Slip' 
=> Packing Slip will be displayed. Here, you can see the Edit button on top of From and To Address. 
=> After making necessary changes in the address, click on save to save changes. |