They say they'll lose thousands of they have to charge sales tax and that the different taxes that states and cities have are too complicated to keep up with.

他们说他们将会面临巨大损失，他们必须征收销售税，而各州和城市所征收的不同税都过于复杂，无法跟上。

Until now, many sellers that have a physical presence in only a single state or a few states have been able to avoid charging sales taxes when they ship to addresses outside those states.

直到裁决生效前，如果卖家只在一个或几个地方有实体产业，他们在给其他各地发货时就可以逃税。