My brother has a child who is 19 years old. The child has been out of school for a year and lives with a friend. He has now decided to enroll in school and to move in with his mother. Will my brother need to pick up the child support again?

Very likely. He will need to read his child suptport orders and see what it says about child support and the child furthering their education after 18

He needs to read his support agreement This is generally governed by the agreement. If he is not living at home and supporting himself, them its possible that support will not have to be resumed.

What state because if he completed HS and he's over 18 then it might be finished.