World Esquire Law Firm | Aime Katambwe
I don't know how long it is going to take for either you or your parents. But you will have to look at the USDOS Visa Bulletin from time to time to see where your parents and you are (will be) in the process. The link there is http://www.travel.state.gov/visa/bulletin/bulletin_5452.html. It is pretty self-explanatory. She will be in the F3 category as USC child over 21 years of age. Good luck!
Answer Applies to: California
Carlos E. Sandoval, P.A. | Carlos Sandoval
You can file the petition now but she will have to wait until there's a visa available according to the Department of State visa bulletin. It could be around 5 year. It's very important that she does not get out of status in the US.
Answer Applies to: Florida