Dad didn't immigrate.

Yes, but you can't leave this country until you get a green card in America. The green card is usually1-it will arrive in about 3 months.

In addition, green card holders cannot leave the United States for more than 180 days a year. So, if you still want a green card, you'd better transfer to America.

In addition, the tuition fee for the first year is based on international income.