If any or all of the above are true you are subject to filing a supplementary Swiss tax return. Supplementary means that in addition to with holding tax on your salary you are required to file a return. With holding tax paid will be counted as a prepayment on your final tax liability. We specialize in Expat tax returns. Our founder was an expat himself for a long time and knows how much hassle it can be living in a foreign country and trying to stay on top of all the “new” laws and regulations. This is partly why we started this business to reduce stress for people like you, there are enough other things to worry about. Let us worry about your taxes declaration and maximizing your deductions.