You can download your tax return after paying but before filing. Also, before paying you can view your Form 1040 and Schedules 1 through 3 by going to Tax Tools -> Tools -> View Tax Summary -> Preview My 1040.
Tentative Tax is your ordinary income tax. AMT, which flows to Schedule 2 line 1, is the amount that must be added to your ordinary income tax to make the minimum tax which you are required to pay under the circumstances. AMT is the difference between Tentative Tax and Tentative Minimum Tax.
