You can schedule USPS pickup in XPS ship by going to the Pickups Tab. On the right side, you’ll see the option “Schedule a Pickup on USPS.com” select it to start a pickup. You will be taken to the USPS website where you will fill out all the information required and schedule a pickup. There will be several screens of information needed and at the bottom of the last page will be the button to Schedule a Pickup. For more details visit the Help Center article: Schedule a USPS pickup
In lieu of a pickup like carriers such as FedEx and UPS, you create a USPS Scan Form for all your USPS shipments. To print the scan form, go to the Pickups tab and select USPS as your carrier. Select the shipments you wish to place on the Scan form and click "Create Scan Form for Selected Shipments". A pop-up will appear confirming the scan for selected shipments. Click "Create Form Scan". When complete, you will see your USPS shipment under the "Recent Manifests". Select your shipment and you will see a pop-up form appear. Print the form and provide it to your local USPS Postal worker with your packages upon pickup. For more details visit the Help Center article: Creating a USPS Scan Form