There are different ways to find documents (and files in general) that have been shared with you in TALENT.
When another user has shared a document with you, you'll receive a message in your Notification Center. Click the bell icon to go to your Notification Center, then click the document message to be redirected to the document's page.
Go to your Videos & Files page. On the left of your page, click the 'Files Shared With Me' under the All Files list.
Then filter the results by the user name or title of the document.
For greater specificity, you can scroll down the Videos & Files page to the Documents list. Choose 'Documents Shared with Me'. Then filter the results by the user name or title of the document.
If shared documents are not appearing on your Videos & Files lists, check your Notifications Center to confirm that the file has been shared with you.