pay tax before Dec. 31 2014. Why and how much?

Somebody mentioned it is a better to pay tax before Dec. 31 2014 if you made money this year.  I do not really understand.  Can somebody please elaborate?

Why do we need to do so?
How to calculate how much should we pay?

Thanks a lot in advance.

所有跟帖： 

• Sorry. Posted twice. -Benitez- ♂ (0 bytes) () 12/21/2014 postreply 23:08:54

• 如果你今年赚钱太多的话，明年报税时可能要收你利息以及小小罚款 -26岛- ♂ (467 bytes) () 12/22/2014 postreply 00:20:51

• Thanks a lot. -Benitez- ♂ (54 bytes) () 12/22/2014 postreply 09:51:36

• 明年补交的州税不能用来抵今年的联邦税， 今年的可以 -nullll- ♂ (0 bytes) () 12/22/2014 postreply 04:29:48

• 怎么抵？ -lbjswan- ♀ (0 bytes) () 12/22/2014 postreply 04:40:17

• one line on 2nd page of 1040form has this -nullll- ♂ (0 bytes) () 12/22/2014 postreply 04:46:43

• 如何提前付？ -lbjswan- ♀ (0 bytes) () 12/22/2014 postreply 04:42:45

• before dec.31, estimate tax -nullll- ♂ (0 bytes) () 12/22/2014 postreply 04:43:44

• 谢答复。写支票还是？ -lbjswan- ♀ (0 bytes) () 12/22/2014 postreply 05:04:16

• 支票 and an estimate form -nullll- ♂ (0 bytes) () 12/22/2014 postreply 05:09:45

• 这个用州税来减联邦税也受到ALTERNATIVE MINIMUM TAX 的影响。也要看你今年挣了多少。另外 -bluecrab2011- ♂ (265 bytes) () 12/22/2014 postreply 05:19:45

• IRS网站上有交税的服务,但我沒用过。 -indexguy- ♂ (0 bytes) () 12/22/2014 postreply 06:41:34