Your sister is a 4th preference, so if you file now, the priority date will be current in approximately eleven years according to the DOS visa bulletin. Regardless, you should consider filing for her to get her a place in line. To do that, you need to file the relative petition and then you will wait for the priority date to be current. Please review this information and contact me for more details. We do a lot of work in the South Asian community. Thank you.
Answered on Jun 06th, 2011 at 9:12 AM