TalenLMS does not directly support two-factor authentication.
you can achieve this increased security through our offered integration
with two established identity management services that do support
two-factor authentication - Okta and Onelogin.
start with you need to enable SSO integration with Okta or Onelogin.
You can find the details of those integration on the following URLs:
TalentLMS & Onelogin integration
you need to activate the two-factor authentication on either Okta or
OneLogin directly. Here are the details from their sites: