My mother is going to marry an American citizen. How can a 20-year-old daughter go to America?

You have reached 18 years old. According to the American immigration law, when the stepparents' marriage is confirmed, the stepchildren have reached the age of 18, and American parents cannot apply for immigration for their stepchildren.

You have to wait for your mother to apply for F2A for you (you are not married, right), about 5 or 6 years.

You should pay attention! If your mother marries your stepfather, or your mother gets a conditional green card (that is, a temporary green card), your study visa will almost fail, and the visa officer will let you apply for an immigrant visa, regardless of whether it is a tourist visa or a study visa, it will almost fail!

If you really want to go to America, you can ask your stepfather to apply for a K4 visa, and your mother is a K3 visa. Don't let your stepfather apply for IR 1 for your mother. Go to America first. Because of this visa, only children under 2 1 year old are required. But after you come to America, K3 can get a green card, but you can't. Once K3 is replaced by a green card, your K4 and visa will be invalid and can only be hacked in the United States. Black people will affect you in America, and your mother will apply for a green card for you in the future.

You should carefully consider the pros and cons.