What are the steps to apply for an immigrant visa for my adult child?
To apply for an immigrant visa for your child over 21 years old who resides outside the U.S., you must be either a U.S. citizen or a lawful permanent resident. If you are a U.S. citizen, you can apply for your children over 21, including married and unmarried children. If you are a lawful permanent resident (green card holder), you can apply for your unmarried children over 21.