When to stop claiming dependent child? Talk to a tax person
Financial co-sponsor? Yes, it is possible.
Talk to an attorney face-to-face. Many of us do Skype consultations.
FORMER IMMIGRATION LAW PROFESSOR -- LEGAL DISCLAIMER: This answer is offered for informational purposes only. It does not constitute an attorney-client relationship.
I agree with my colleagues.
Law Office of Luis A. Guerra (954) 434-5800. This answer is of a general nature and should not be relied upon as final, nor is it intended as legal advice.