I just moved to France to marry my fiance and would like to start a website about the city I live in (there's nothing in English). It would be mostly a hobby but I would use things like affiliate programs, googleAdsense, Amazon program, etc to make some extra money to pay for the website. I can't find any info on paying taxes on this income or if I need to file the business with any govt agency. Can someone help me, please? Thanks.