How do I turn off two step verification

For information on turning off two-factor authentication, see the following from: Two-factor authentication for Apple ID - Apple Support

If you're already using two-factor authentication with your Apple ID, you can't turn it off. If you updated to two-factor authentication inadvertently, you can turn it off within two weeks of enrollment. If you do, your account is less secure and you can't use features that require a higher level of security.

If it has been less than two weeks, see the email that was sent when it was turned on for instructions on turning it off.

If two-step authentication has been active on your AppleID account for more than two weeks, it cannot be disabled.

Additional information about Apple's two step authentication can be found here:

Two-factor authentication for Apple ID - Apple Support