什么是working credit？

qwertypoiu

今天第一次收到centrelink的payment，3月份申请的到8月份刚审核，可是只给发了一个月的，说因为我没有提供税号，所以信上写着payment has been cancelled。然后有这样一句话：As your payment has stopped you can no longer use your working credit. you may access 100 credits again if your payment restarts or you reclaim within the next 12 months.
请问明白的朋友，这个是什么意思？我是应该提交税号就可以了吗？谢谢

红宝石小屋

If you're working, it lets you earn more before we reduce your income support payment.
We use each Working Credit you have to offset $1 of employment income. Once your Working Credit balance is zero, your income support payment starts to reduce.