I only made 100$ this year can I still file head of house and my dependent

[xmasbaby0]

Your only income was $100?   How were you and your child supported?  Sounds like someone else can likely claim you and your child as dependents.   You cannot get the child tax credit with only $100 of income --and you do not even say how you got the $100---did you work?     The child-related credits are based on income from working.   Not sure how $100 of income could make you head of household---since that also means you paid over half the costs of maintaining the household.