A good one! I remember I needed a stamp when I started a business in Poland as well! I've never used it and never was asked to so I guess the regulations no longer apply.

Poland is pretty good at digitalizing bureaucracy as well. You can do most things online including talking to the tax office and solving problems with your tax declarations.

Taxes are reasonable but I am still bitter about cap gain tax as it's a form of a wealth tax for someone that invest in equities - at some point moving to more tax friendly jurisdiction saves enough that you can fund your comfortable life and save 100% of your income.

I also think tax burden is going to increase significantly there in coming years.