How would a U.S. citizen get a green card for an immediate relative?
Follow these instructions to apply for a green card for an immediate relative of a U.S. citizen:
If your immediate relative has previously lived in the U.S. without any legal status, they may be ineligible for a green card, or they may require a waiver, depending on the circumstances. Consult an immigration attorney before you file any immigration application.
Follow this set of instructions from United States Citizenship and Immigration Services (USCIS) if you are a U.S. citizen applying for an unmarried child over 21, a married child, or a sibling over 21: