Estonian companies cannot pay out money without paying taxes. If you pay out salary you will pay around 50% tax unless
you have a certificate showing that you are paying tax of that money in another country.
I highly doubt PwC would assist the Estonian government to put this information out without it being correct.I still doubt that is correct. I would check with an expert. I know that there are people who get money from their Estonian companies without paying taxes.
I'm also almost 100% sure that A1 certificate stuff only applies to Estonian residents.