21歲子女必須和在美國的工作父或母住在一起至少半年嗎? and filed the tax return together嗎?
-Yes, thus the parent's income can be counted as the family income. Then, the child files I-864, and the parent files I-864A to allow the child to use the parent's income to sponsor the parent green card application. It seems strange, right? But that is the law.
分住在兩個州行嗎?
-Probably no. Consult this issue with a lawyer, but don't hire the lawyer until you are sure whether you can use the parent's income for him/her green card application in case you waste your money to the lawyer.
在美國的工作父或母給21歲子女付學費.