More information, much more information is needed.
Did your dad marry a US Citizen? If so, then your step-mother can sponsor you right now.
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I agree with my colleague. The ability of any alien to adjust status requires a review of the total immigration history, family relationship, etc to be able to give a legal opinion if an immigration benefit is available.
Legal disclaimer: The statement above is provided by CC Abbott is based on general assistance and not intended to be a legal opinion because not all the facts are provided. The person requesting information and all others reading the answer should retain an attorney who is permitted by the state bar within the jurisdiction who can examine the complete facts and provide a legal opinion on your case. All information provided in the above answer and other information provided by CC Abbott does not create an attorney/client relationship within any state of Federal law.
Depends on how your dad got his green card.
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