Do not include your old 1040 nor your revised 1040 because the Form 1040-X reflects any changes there and becomes your new tax return.
Include any new/corrected tax document (e.g. W-2) only if it shows federal tax withheld, and include in order only those Sequence Numbered tax forms and Schedules that changed or were added due to your amendment.
If you are using TurboTax you have to do this by careful visual comparison. The program won't break out those pages for you.
@LT5
