i did the same thing for my uncle and aunt. i don't know if it is ok.but i called the telephone number which was on the letter, asked them to add the dependant, it costed me 18 $ to call them. if u want , u can call them.
tttjjj2002, thanks a lot for your info. 6 H9 q& S$ V* j8 |! p! r& ]9 O+ z8 }4 ]/ z2 {
Anyway I am not in a hurry, so I gonna take risk, go thre to try. If they refuse to process their application together, then I'll make another appointment.