To set up multifactor authentication (2FA) on an account, click on your profile picture then on My Account.
In the MFA section, you have the option to use an Authenticator App like Google Authenticator or receive a code via text SMS.
If you select SMS, you'll need to enter a valid Canadian or US number. You will receive a code which will then need to be entered back into SkyPrep to confirm your number.
Selecting Authenticator App on the other hand will display a QR code. Simply scan this code using the authenticator of your choice. Once you've done that, enter the code you see in the text field.