invoice

I have a startup dropshipping business. I'm selling to people only inside the US (I'm European). Dropshipping basically means: The customer buys something from me, and I buy it for him from other sellers where the given product is cheaper. But in my home country (Hungary) has sticks rules about...

Hi all, first sorry, but my English is not perfect, because this isn't my main language. (Main: Hungarian) So, I'm a local software key seller, currently I not reported my business in anywhere and do this without a company, so I don't give invoice to my customers. In the future, I want to...