Hi @Radko there is tax 2.89% for the health system, correct? That means that if you have dividends from abroad, you have to pay this tax (and nothing more). Using the 60 days non-dom. Please correct me if I am wrong.
It's 2.65% up to a maximum of 4,770€ per year, so if you make a lot on dividends you'll never pay more than that (that's equivalent to 180K on dividends per year, anything above that you don't pay anything extra).
And nothing else.... As long as you stay there for 60 days per year as a non-dom.