I use Verena Conte on Giesshubelstrasse (opposite Migro's at Brunau Park). I only used her once so far but she managed to sort out a couple of problems for me and I haven't had any issues with the tax return that she did last year. I can't give an exact price as she did lots of additional work for me the last time but I believe she's around the market average. She speaks German, English and Italian very well.

As a side note, my tax bill usually works out at around one months salary for the Kanton and this seems to be what other people pay. The Government tax seems to be a flat rate but I can't remember what it was.