Get your taxes done using TurboTax

I can find the form just fine. What is totally unclear is how to populate the form using the Easy Step system. 

 

In my case, I got married last year and my wife and I want to compare MFS vs. MFJ. Even if we file jointly, we want to know our relative shares of taxes and/or refunds. How do we enter all of our tax-related information using the step-by-step approach so that it applies to each of us individually, which would be necessary to populate the What-If form?