Once shipment tracking number is generated, the user can create the labels from the UPS site.
The URL for all shipments created for UPS account is - https://www.ups.com/ship/history?loc=en_DE
Select the required shipment and choose Get Labels as shown below.
Then on Print labels option screen, select the Print option to print the label for the shipment.
For more information, refer to Labels and Receipts FAQ at the following link
https://www.ups.com/us/en/campusship-support/labels-and-receipts-faq.page#contentBlock-11