To deduct home expense allocated to your business,you,as a self-employed person,

must be able to prove that you use the home area exclusively and on a regular basis

as a place of business.

还有这一句是什么意思呢？

Just as railroads and telegraphs in the mid-19th century made
copyright and patent theft commercially important,so the
Internent and associated information technologies
redefined the market for inventions.

To deduct home expense allocated to your business,you,as a self-employed person,
must be able to prove that you use the home area exclusively and on a regular basis
as a place of business.
减少家中支出而分配到你的事业上，你，做为一个雇用自己的人，必须证明你专注地和经常地使用家中领域为一个做生意的地方。
Just as railroads and telegraphs in the mid-19th century made
copyright and patent theft commercially important,so the
Internent and associated information technologies
redefined the market for inventions.
十九世纪中期，当铁路和电报刚刚说明了着作权和专利的仿冒盗取是商业上重要的，所以网际网路和其有关的资讯技术为发明重新定义了它的市场。

PS.读英文要避免翻译，直接读懂意思就行了，因为翻译起来很扭捏的啦