I can recommend abt below. I've used them for the first time this year. A guy there spoke good english and he gave me a pre-printed English checklist of what he needed. I returned what he wanted to him and he returned a completed tax return with a 190f bill. This is a lot cheaper than the 300f I paid before to another company . Ohh and the secretery doesnt speak English so if your calling by phone be aware.

http://www.abt-treuhand.ch

Lättenwiesenstrasse 3
Postfach 1122
8152 Glattbrugg
Schweiz

Telefon 01/874'46'46
Fax 01/874'46'99
info@tabt.ch