If you go to your "Shop Payment Account", you'll see "Shipping Labels" in the left column, click onto that.
2. Once you're on that page, you'll see three tabs, click onto "Options", then click "edit address". Simply change your name to your shop name, afterwhich, scroll down and click the "Use Address" button.
3. When it takes you to the next page, scroll down and click the "Save" button (it took me a few attempts before I realized I didn't finish the last step, so it didn't save it until I actually clicked the save button, lol...)
I hope this helps Tin~ have a great evening~