I found that you can get back to the "Here's the income that Colorado handles differently" page if you click through to the end and find the button that says "Go over Colorado again"and keep clicking "Continue" until you get to the page.
A related question: Does the Colorado 529 contribution go in the box on the page "Colorado Subtractions from Federal AGI" ?? I contributed about $5,000 to the 529 and the Federal amount reads "$5,000". The Colorado box reads zero at the moment.
