We adopted a daughter after age 18, she is here on a F! visa. How do we chamnge that to an immigrant visa

Unfortunately as you probably know by now, there was no stepparent-stepchild relationship established for immigration purposes when you adopted your daughter at the age that you did. She will have to seek to immigrate through some other means. She could possibly do it through employment in the way that many students currently immigrate to the US through graduating from college, obtaining practical training and perhaps later in an H-1B specialized occupation visa status, and having the employer then sponsor her under labor certification for the green card. Such would entail testing the American job market to ensure that she would not be taking away a job from a US worker who is able, willing, qualified, and available to take the position. Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.