Very little until the minor reaches the age of majority and becomes gainfully employed. Before a child support suit against an alledged father is taken into consideration by the court the child's paternity must be established. In such a case, the mother may wish to consult with legal advisor to determine her own status in the situation. If she was an adult who became sexually involved with a minor she could have problems of her own relating to the legality of the relationship.
well yeh you have to give support you got her pregnant for the love of god
no
Yes. In addition, he could also be ordered to pay additional support for the grandchild.
The father would have to establish paternity and acquire legal custody of the child.
He needs to file for a modification. See Dads House link below
Yes (she should file in the US); however, actually collecting support might be difficult.
Probably; but if he didn't pay when the money was important, he most likely won't now. Let it go--it is in the past.
$50 at the most
The courts will not use anyone's past tax records as a factor in determining who owes child support. The amount due for child support has nothing to do with income taxes. Income taxes is a last resort for collecting back child support owed but their are other ways of collecting this before it becomes in default.
see related question
Yes you can file for your daughter since underage fathers also have to pay child support. In some cases if the father is too young to work etc his parents can be forced to pay until he is old enough to get a job. Otherwise you can see if your daughter is eligable for welfare.
The laws differ in different jurisdictions. In some states the father's parents can be held responsible for child support until he reaches eighteen years of age. In some states paternity would be established but would not be enforced until the father reaches eighteen. You need to check the laws in your jurisdiction.