Moin together ! I hope you can help me. I work in the employed field service with an insurance company. For the journeys to customers I use my private car. From my employer I get a RKP which is of course taxed. In addition I run with 3 work colleagues a small office which I go to about. 3 times a week. Since I was still in training until summer 2016, I have no experience with keeping a travel book. Since beginning of 2017 I have introduced a Travel book in order to make the journeys to customers taxable. I am not sure at the moment whether the keeping of the travel book is at all correct. I drive every day about 60 km on business. It makes sense to keep a travel book or am I wrong? I always write in the travel book: date, travel time (when I left in the morning and came back home in the evening), route (there I write only the place. At the request of Fina nzamts I could list exactly where exactly which customer lives, because I have daily reports for my employer), purpose of the journey (usually I simply write “customer dates” and KM-Stand start of journey, driven kilometers (exactly determined by a route planner) and KM-Stand end of journey Sometimes my days also run so that I e.g. drive to the office in the morning to make preparations or take care of customertermien and then I drive back to my customers. then also all trips with this flat rate of 0.30 Euro paid off? There is in my travel book still the column “Visited persons”. I would hate to write the names of the customers there (data protection!). Shouldn’t the tax office really have a problem with that? If you can help me with my questions I would be very grateful to you.