@sgopal2 - In most cases, US citizens living abroad do not have any in-state residence for tuition and fees purposes. What they do have is in-state status for voting purposes. That can be claimed in the state of last residence, or in the case of citizens born abroad, in the state of the citizen parent’s last residence.
@justbehonestwme - One useful source of information for you is the EducationUSA website, and the advising center closest to where you live now. If there are no counselors near you who have worked with a US citizen recently, they have colleagues at other advising centers who have. EducationUSA is a not-for-profit organization that is supported by the US State Department - in other words by income taxes paid by US citizens worldwide. Any fees that might be charged will be very low, and will go directly to the support of that particular advising center.
https://educationusa.state.gov/
Advising Centers in India: https://educationusa.state.gov/find-advising-center?field_region_target_id=&field_country_target_id=306&field_center_level_value=All