The $100k is a GIFT, not income. The tax reporting on the GIFT are you parents’ issue, not yours. They each can give you and your husband $14k per year, so if they did it in Dec and Jan, they wouldn’t even have to report any of the $100k ( $14k to you from mother in 2018, $14k from father, then the same to husband, then the same to each in 2019) If you put the $100k into the house before filing the FAFSA or the CSS, it is part of the equity of the house, your primary residence, so you’d report it as needed (not on the FAFSA, as the equity on the CSS).