You need to have abled Passwords in Team Viewer, see this article https://support.mirrorsphere.com/en/support/solutions/articles/11000103534-allow-teamviewer-to-show-passwords
Open the TeamViewer Application by Left Clicking on the icon indicated below.
If you haven't completed the previous link above, you will only see Your ID, Please complete the previous guide, linked at the top of this page.
If done correctly, you should see below.
You can provide Your ID and password then the remote thrid party can then access your PC