By default (if you did not check the paper invoice option), the invoice is sent as PDF via email.
If you write us a short email with the invoice address to be used, we will check your account the ensure that the invoice address will be correct. You can also create a second account for your company, and we can then cross-link your account ay employee-account to the new one. But if you don't bother, you can also put the company's address in your account when the shop asks for the address.