父母去年拿到綠卡，準備辦RP在中國兩年，需要給他們在美國報稅嗎，這樣對保持綠卡有好處嗎。
-That is required.
如要報真的要連中國的退休金都要上報嗎。
-Yes. But they may not need to pay the tax because their income is too low. Anyway, just file 1040 tax return following the instructions even if they do not need to pay the tax due to low income.
