The parents have a financial obligation to support their daughter in most States until the age of 18, 19 if still in high school. The father having lost custody in 2007,should at that time have resulted in court ordered support. Is it possible that support is being paid to the mother? You might want to check with family court on this because it is unusual for support to have not been awarded to the custodial parent. Your having 'temporary guardianship' should entitle you to child support, but it has to be court ordered, and the only problem is with child support being so expensive these days a parent (who has not been disqualified) may elect to keep the child instead of paying. Don't think collecting child support would preclude filing with the child as a dependent.

