Ask a tax counsellor who knows about online business (there are shockingly many who today still have no idea about it). That said there is no straightforward,

Ask a tax counsellor who knows about online business (there are shockingly many who today still have no idea about it). That said there is no straightforward, easy way to deal with this. The whole process is an insane mess. You can do everything correctly and still have problems with your local tax authorities afterwards (partly because they don't really know how to deal with these regulations themselves).