Send her to Liara on the Citadel

“You know what… I need some extra parts to uh recalibrate the guns,” Garrus said. “Could you go to the Citadel where Liara’s new office is and pick it up?”

“Isn’t that something Shepard usually does?” Tali said.

“Oh yes, you can bring Shepard, but I’m sure Liara would appreciate seeing your new belts. Why don’t you go while we’re docked. If you want to bring Shepard for the journey, you can, or I suppose I could go with you…”