Easytax is the electronic method of filling in the tax return. It prompts you to fill in boxes and has numerous tabs etc to fill in extra detail and then it produces a printout for the tax authorities. It also very usefully allows you to maintain and import last years data so you can see what you told the authorities in the previous year so that you can have some form of continuity which helps disguise statements that are not the whole truth. You can download it from the tax authority website or from Easytax itself which goes under hwis.ch. Note though that Baselstadt have their own version which is more or less identical called Baltax I think.