how do i apply for usa green card

Short answer

To apply for an Employment-Based Green Card (EB-2/EB-3) from India to the United States, you need a job offer from a U.S. employer who will file a labor certification and Form I-140. Required documents include proof of qualifications and employment. Fees vary but can exceed $700 for filing. Processing times can take several months to years. Verify current rules on official government or embassy sites as requirements change.