you may be able to get a better response, and the other poster is right on, about maybe taxes got increased by some other reason, so you really have to look at all your forms to understand.
but for just understanding your amt, I suppose you could switch to "View Forms" rather than "Step by Step" and then look for whether there's a Form 6251 in the list of forms Turbotax did for you. Form 6251 is AMT calculation.
You might also look through whether do AMT calcs in the step by step, instead of "view forms".
