In the first place, I think that you can't use Paypal Belize to receive money as a business. Or at lease there are some limitations that makes a Paypal account from Belize useless. I tried it a long time ago. It is a waste of time.
I don't know in Austria but in germany and france, paypal sends data to the tax authority.
I'm not sure if it's changed or not but last time I checked, they report automatically to the IRS on income over $20,000. In other countries, they report information when requested. The information would probably be name/DoB/address/tax number etc.