I have a question about my parents' visa. They are holding G4 visa now (through my sister). I am a green card holder now. I am planning to apply green card for my parents once I am a citizen. Can I file I-130 while my parents are inside US?
I know there is no problem to file I-130 if they are outside US. But for G visa, I do not know whether it is feasible to file I-130 while they are inside US. Some website says yes, some says no. I am totally confused.
Many thanks for any input.