[dijit]

There are laws about exactly that, you will have to read them as they apply to you, avoiding them is quite literally illegal.

In Europe, we have freedom of movement for goods and services, special tax status still has to exist between (for example) Denmark and Sweden, for Swedes who travel the bridge to Denmark to work. -- I believe this is called the Oresund agreement.

You must have a primary residence and you must spend 51% of your time there. Other countries in Europe do not permit working from them unless it's temporary, I believe you have 3 months to register with the local tax office.