Follow these steps to enable fingerprint authentication from Security Settings:
a.Log in to the myTFS app with your username and password
b.Select More from the Home / My Account page
c.Select Security
d.Toggle the Touch ID or Fingerprint switch On
e.Select Continue to go to the Login page
f.Enter your username, password and select the box next to Enable Touch ID or Enable Fingerprint
g.Select Login
h.Enter the Answer to the Security Question
i.Select if the device is Personal or Shared, then select Continue
j.Agree to the Electronic Communications & Agreements and Mobile Application Policies and Agreements
k.Select Enable to activate Fingerprint authentication
l.Select OK to set up your Security Question and Answer for Fingerprint authentication
m.Select a new Security Question
n.Enter the Answer to the Security Question, thenselect Continue
o.Select if you would like the Security Question to be presented with every login
p.Select Finish to complete enrollment