It’s been 3yrs since my us citizen bro petitioned me for a green card. I already live in the US and have a work permit through DACA. how much longer ?

Assuming that you were not born in Mexico or the Philippines, the waiting time is approximately 12 years, and since it has already been three years, approximately another nine years. If you were born in Mexico or the Philippines, the waiting time would be much longer as persons from Mexico are only eligible to immigrate if a petition was filed by early 1997 and for the Philippines before the middle of 1998. 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.