Not sure I follow. If US Multinational charges license to Italian Subsidiary, then the pricing impacts the profit allocation between the two entities. The IRS will say "the license should be really high" so the profits in the US are higher. The Italian tax authorities will say "the license should be low" so they get more tax revenue.
For a complicated technology that's licensed, remember that neither taxing authority has any clue as to what it's actually worth. They don't care. They just want tax revenue. Remember to think about both taxing authorities when analyzing these transactions and imagine the ridiculous situations multinationals are put in.