https://www.etiaseu.com/
https://www.etiaseu.com/us-citizens/etias-italy
First:
>From 2026, U.S. citizens need to register with the European Travel Information and Authorization System (ETIAS). ETIAS is the new electronic travel authorization for visa-exempt non-EU nationals visiting the Schengen Area.
So this year no ETIAS registration is necessary.
Second:
>As a U.S. passport holder, you can visit Italy without a visa for up to 90 days.
>From 2026, you’ll need to apply for ETIAS to travel visa-free.
Again. US citizens don't need visa to visit Italy.
From 2026 they have to register at ETIAS.
I think that's about it.