Peggy, even if you will not physically print the wrapper, you need to go through the "print" process. It will give you the address and signal to the system that you have accessed the address. Here is the Help Center doc on handwriting the label:
Can I hand-write the address to send a book?
Yes. If you cannot (or do not wish to) print the wrapper, you may hand-write the address on your package. You will need to access the address from the request for the book on your My Account page, just the same way you would begin if you were going to print it; then just click the "hand-writing" option at the bottom to view the address that you can copy onto your package. If you choose to hand-write the address to send a book, neither PBS Delivery Confirmation or PBS Printable Postage may be used for that shipment.
Here is how to get the address:
Click on the request for the book.
The Wrapper Settings page will come up.
Choose the orientation (layout) of your wrapper
Scroll down and click the link to "hand-write the address"
Be sure to include the Request ID# as part of your return address.
this is not crucial, but it helps us locate the request if you need to communicate with us about it.
Be sure to mark your package conspicuously MEDIA mail if that is the rate you are using to mail it.
If your package weighs 6 ounces or less, it will be less expensive to send First-Class.