跟着问一个问题：查了一下所在州的top州税率是4.75，为什么根据paycheck算出来的是7.4呢？

 7.4? 抢人吗。还要不要人活了。

很正常啊。如果你是第一张paycheck，还是保留这样比较好，如果改w4，交税少了要交penalty的。明年再根据今年的年薪和schedule A deduction调整exemption.

啥是，exampt?

it's how many people you claim as dependent on your paycheck. the more exemption you have, the less federal and state income taxes will be withhold from your paycheck.

you can always change your number of exemption during the year to adjust your tax withholdings. Some people like to get a big refund at year end when filling taxes, but many consider that as a free interest loan to the federal government, so with a proper exemption number, you can minimize your tax due/refund of the year.

第一张，是不是有sign-in bonus？ 我第一个也是这样，sign-in bonus的钱扣了近50%， 以后正常的工资大概扣1/3。