Questione giuridica chiave
Whether the Vaud assessment had to be annulled because the headquarters allowance for Zürich should be 20% rather than 10%.
Decisione estratta
The complaint succeeds against Zürich, but the intercantonal allocation must use a 10% headquarters allowance for Zürich, not 20%.
Motivazione estratta
Because the allocation was already made indirectly on payroll sums, the headquarters’ central functions were sufficiently reflected. Services allegedly performed through a separate management company in Zürich did not justify a higher allowance; any underpricing accepted by Zürich was irrelevant to the other cantons.