A tax authority accepts your tax return. It does not approve it. That only happens if they audit your tax return for correctness...which is what happened here.

A tax authority accepts your tax return. It does not approve it. That only happens if they audit your tax return for correctness...which is what happened here. The Italian tax authorities audited the returns and determined that the delivery services had made mistakes on them in the way they mischaracterized employees as contractors. 2) False. The delivery companies told drivers to register as self-employed, which was incorrect legal advice at the time it was given, under the laws governing contractor/employee classification (for tax purposes) of the U.S. and the E.U. 3) Absolutely false. The delivery companies misrepresented the tax classification of their employees and failed to pay the appropriate taxes on them. Full stop. 4) You brought this up. You keep claiming that filing a tax return automatically means its correct, which it does not. It merely means that you filed a tax return. The tax authority will audit returns randomly selected (or in cases like these, deliberately selected) for correctness and assess back taxes, penalties if appropriate.