A United States citizen cannot file an immigrant visa petition on behalf of a parent until he/she reaches the age of 21. Once you are 21 you may file an immigrant visa petition on behalf of your mom. The process your mother will need to go through to obtain a green card will vary depending upon her immigration history including her manner of entry. You can read more about family immigration at http://myattorneyusa.com/family-immigration.
Answered on Jun 14th, 2016 at 3:31 AM