Go to Assets. Click Software >> Software License from the left panel.
This opens the software license list view page. By default, the list of All licenses will be listed.
Click the software license name to be attached to a document. This opens the software license details page.
Click Attach Documents and choose the file from the displayed pop-up. The maximum size of the attached file can be 10 MB.
On selecting the file, click Open to attach the document.