This is a FAFSA question, not a tax question. You should look for help on the FAFSA web site or call the contact number.
I'm not sure which question on the FAFSA you are concerned about. The FAFSA doesn't ask about dependents with the same meaning as dependents on your tax return. It asks "How many people are in your household," including "your children, if you will provide more than half of their support. . . ." That's a different requirement from claiming a dependent on your tax return. You can claim a child (under 19 years old) as a dependent on your tax return even if you don't provide more than half of the child's support. Conversely, providing more than half of the child's support does not necessarily entitle you to claim the child as a dependent on your tax return. So your daughter could be a person in your fiancé's household, according to the FAFSA definition, even if he cannot, or does not, claim her as a dependent on his tax return. Whether someone is a person in your household for the FAFSA, or a dependent on your tax return, are two different questions with different criteria. You would have to figure out who provides more than half of your daughter's support. If your fiancé does provide more than half of her support, then she would count as a person in his household under the FAFSA definition, and counting her would certainly not be false or misleading.
That's how I understand the instructions on the FAFSA. But I still suggest that you check with FAFSA if you want to be sure.
