Print USPS Scan Form
You can print the USPS Scan Form by going to the Order History->Batch History, and click on the "USPS Scan Form" button.
You should print the scan form on the same day the packages will be picked up. Since you can only print one Scan Form a day, you should wait till after you finished shipping all the orders for that day before printing the Scan Form.
If you have setup multiple shipping profiles and each shipping profile has its own address, the scan form will be generated with several pages, with one page corresponding to each shipping profile address.
NOTE: If your package is a First Class Large Envelope/Flat it is not eligible to be included on the SCAN form as it is not a trackable package type.