What I have to do now That I discovered this new way outside the 'normal' way to pay goods?
(Maybe this is old, however, it may help other newcomers)
There are a few payment processors and programs that allow you "accept Bitcoin" and receive, depending on your needs, Bitcoin or Euro/USD/... (which may be the easiest for taxes).
If you want to receive Bitcoin, you better start with reading about Bitcoin wallets and their safety.
If you want to receive Euro, you simply have to find an established payment processor for this task (bitpay or other).
Two things to keep in mind:
1. Confirmed Bitcoin transactions are irreversible.
2. In order consider a transaction done you have to wait for at very least one confirmation.
Good luck!