---学校发工资时总是先把联邦税，州税和市税都先扣去了。因为扣得还略多一些，
---我每次报税总能拿回一些。
you need to keed receipts for all deduction item.
--我这几年都是三年报一次税，也没出过问题（反正税已被按时而且稍多地扣去了，我只是晚一点要会多扣的部分罢了，所以比较心安理得）。
you should file tax annually. If you filed for every 3 yrs. you will need to pay original tax, interest, plus some putative money
----我不知道是我出了问题还是IRS出了问题。
not sure if you filed yourself or some professional. if hire professional (I means with licence) for you, and you tell them all truth. Then the professional will take full responsibility
