Ok just want to be sure you were not talking about the I-765.... I will assume that the K-2 entrant is under 14 years of age since that is the only time the fee reduction applies. This is in interesting situation.... I haven't seen any K-2 AOS applications filed concurrently with the K-1 get rejected so I have no data to pull from. Since you filled out the Filing Category part correctly, it seems to have been rejected in error and my logical brain says that if you include the rejection notice along with the neon green paper and an explanation that it was originally filed concurrently, that they should accept the reduced fee. However, I would defer to longer term members here to get their thoughts as well. @Crazy Cat @TBoneTX @OldUser @Dashinka