我儿子为他太太申请绿卡，我是co-sponsor。他递交了所有需要的材料，包括所有的我的tax returns，w-2s. 我儿子在上学，他的收入每年只有$300， 他这几年没有报税. 移民局来信说，要complete document for most recent tax year. 我们还要交什么材料？ 信中所指的"most recent tax year" 是2017年或者是最后一次交税的一年？
-It means the tax return of 2017. Your child needs to file one I-864, and you also need to file another I-864 together. Then, you provide the copy of tax return of yours and your employment verification letter from your employer. If your child has no tax return due to no income or low income, he does not need to provide it, and just explain that he has no tax return due to no job or low income.
It seems your child filed his I-864 and you did not file yours with his and that is why USCIS sent him RFE or his tax return, etc. If it is true, you need to file your I-864 and provide what I said above for response to the USCIS RFE.
谢谢
