Help ! Question about 485 file for kids 485forkid2007-06-23 05:38:18

I just got my GC on 12/6/2007, PD 7/2006, EB2, TSC
Want to file 485 for my sun,
1) Where shloud I file, NSC or TSC where my orginal case filed.
2) How long it will take for him to get GC.

Thank you in advance.