求助! Request I-485 Interfiling 的地址

我上周寄出的485 Relink Request被无情的TSC退回了. 左思右想也没有figure out why. I just did the same thing as I searched in the forum. One potential mistake may be that I put Dept A in the address on the envelope. I read somewhere that I should leave Dept A out when I send TSC letter to request relink. Anyone can confirm this for me? Thank you very much.


Also, do you know who i should address to in this mail? Just USCIS TSC or the Supervisor of the Employment Based Unit ( from Derlin's post)

Thanks again.

Waiting till got the answer.