I have the personal assignments from Garrus and Wrex, which activated through extended conversations with them. However, I've explored the whole conversation tree with Tali, and I still have not received her quest.
What do I need to do to acquire Tali's personal quest? Is there a certain sidequest I need to do? I've skipped over many of them because I'm only on my first playthrough and I'm saving most of them for my completionist run to get to level 60.