I had Nalia in my party & let her go. I completed Lhetinan's quest with the slavers but when I get back to the Copper Coronet I can't find Nalia to get the quest.

Any suggestions or help would be appreciated.

Thanks

If you let her go after you had agreed to take the quest then she should be waiting in the little fort South of the Hold. (D'Arnise that is)

I also remember some kinda bug, where you won't get XP and Gold if you
let Nalia join after you meet her at the keep and immediately drop her. Happened in a Multiplayer game though.