To preview your Form 1040 using TurboTax Online, use the following steps while working in your tax return:
Since Schedule 1 is part of Form 1040, it will be included in the forms you can see.
If you are using one of the CD/downloaded versions of TurboTax, click the Forms button in the upper right corner of the screen to go to Forms Mode where you can view Form 1040 or any other form that is included as part of your return. Once you are in Forms Mode, click the form name in the list on the left side of the screen.
If you determine that the early distribution penalty has not been reported on Schedule 1 part II line 18 as expected, go back to your Interest Income section and verify the entries from your Form 1099-INT.