Hi livewire666, thanks for your post.
If you go to the payments tab in your seller hub, and click on reports, you will be able to download a report for your postage labels. Here is a quick link to that section in case you want to use it.
I've also added a screenshot here for better visibility.
Hope this helps,
Marco

I am currently away, and will return on the 5th of August. Please expect a delay in my replyDid you find your solution? Help other members by marking your problem as solved. Simply click on "Accept as solution" for the answer that helped you.