how do i change my security questions

The Three Best Alternatives for Security Questions and Rescue Mail

1. Use Apple's Express Lane.

Go to https://expresslane.apple.com ; click 'See all products and services' at the

bottom of the page. In the next page click 'More Products and Services, then

'Apple ID'. In the next page select 'Other Apple ID Topics' then 'Forgotten Apple

ID security questions' and click 'Continue'.

2. Call Apple Support in your country: Customer Service: Contact Apple support.

3. Rescue email address and how to reset Apple ID security questions.

A substitute for using the security questions is to use 2-step verification:

Two-step verification FAQ Get answers to frequently asked questions about two-step verification for Apple ID.