If they filed a 1040A, then you put the amended 1040A information on the FAFSA. However, it's possible that something they changed when they amended their return required using Form 1040 instead of 1040A. If that happened, then you have to put the 1040 information on the FAFSA. The only way to tell is to look at the forms in their amended return. It doesn't matter what they filed originally. What matters is which form was used for their amended return.
