@borkdude: I'm invoicing a US company from Germany and my accountant told me not to put VAT on it. This is a German "Merkblatt" for this kind of stuff: https://drive.google.com/file/d/0B9NLQz2o0Kj0UnRVT0RZSzNqRGZWRklWT2hfT016RndWZkY4/view?usp=sharing