london_girl
questions like this have been answered so many times here!
take a look through the
http://www.englishforum.ch/tags/tax/ threads. Richard has some great advice.
what you received is not your tax forms. what you have is equivalent to your P60 in the UK/IRL. It will be needed to help fill in the tax forms you WILL receive in March or May depending if this is your first year in the system.
Your salary is >120kCHF means you WILL eventually get a set of forms in the mail.
I think you will have to submit your tax return in ZRH. I think they take where you live on the 31st Dec as your tax location. ZRH & ZUG will then fight amoung themselves to see who gets the tax you have already paid at source.
Play with this software:
http://www.steueramt.zh.ch/html/steu...g/software.htm
in preperation for completing the forms. It is a great help in generating teh tax forms and also how much you should expect back, because of all the deductions you can make. Your travel expenses from ZUG to ZRH should al be tax deductable.
bill