Accept terms and conditions logic

[anarion80]

How should I execute something very simple: Having a step that the user needs to click Yes to proceed and submit form?

I have a legal terms step with Yes and No answers and when the user clicks "Yes" they should be taken to Thank You page. When they click no, they should be taken to the step saying they should accept Terms&Conditions, and then BACK to the same step.

I can't seem to add any previous steps in the logic:

What is the usual way to do this?