Thank you for the answer.
I know, it’s a bit complicated… I want to explain it:
In Germany you don’t have to handle tax/vat as long your are a small business owner (§19 UstG). Gross = net prices.
But this tax principle for small business owner is only specific for Germany. It doesn’t exist in Austria, France, Netherland, etc.
From the 1.1.2015 you have to handle taxes in Europe for digital sales depending of the buyers place. So if someone from Austria buy my tutorial, I have to handle 20% percent tax.
The question was, what small business owner can do. I don’t want to handle tax for Germany in the moment. So what I can do is at the end of the year send a list with all sales outside from Germany and pay the tax depending of the country of delivery. This reduce a bit my remaining income, but I have less work with the master data and no problem with my customers from Germany (more than 90%).
So my idea was to work in the shop only with gross prices and save the addresses.