回复: 搬家如何通知税务局改地址?
终于搞清楚supporting payment file number是什么了。
"This file is an amount of money that is paid by a former spouse, for your children, following a court judgment. If you do not have support-payment file number, you must leave the field blank."
这个显然很多人没有的,问题是空着,继续不下去啊。
还是乖乖的一个网站一个网站改了,或是一个电话一个电话打了。