Even when you mark a device as trusted, there are certain factors that will require you to enter a Verification Code when you sign in:

• Turning 2-step verification[LINK TO NEW FAQ W/DEFINITION] on, you will be prompted every time you sign in
• Browser updates or removal of cookies
• A change of device or browser
• Signing in from an unrecognized location or IP address
• You haven't signed in for awhile
• Other security factors

Related Links:

• What does "Don't ask again on this computer" Mean?
• Can I Skip the Verification Code Step?
• What is a Trusted Device?
• Can I View and Manage My Trusted Devices?
• Why Did TaxAct Begin Using Verification Codes?