Yesterday, of course, was tax day.

昨天, 当然也是纳税日。

Yes! This year it's tax day in America.

是啊！是今年的美国报税日。

Today is tax day, and I might not finish my tax form.

今天是报税日，我可能完不成我的报税表了。

And then I feel like a loser until tax day is over.

然后就一直觉得自己很逊啊 但是报税日一结束。