Complex sentence: Under this law Italian taxpayers can choose to whom devolve a compulsory 0.8% ('eight per thousand') from their annual income tax return between an organized religious recognised by Italy or, alternatively, to a social assistance scheme run by the Italian State.
Split into simpler sentences: Under this law Italian taxpayers are able to vote who shall receive 0.8% ('eight per thousand') of the total amount raised by income taxes. The money may go to a religious organization recognised by Italy or, alternatively, to a social assistance scheme run by the Italian State.