1040X

1040X 你去看一下就知道，和1040 每行一樣，不過右邊要填 $$$ before amendment （originally filed）和 after amendment (amended number)

and you have to attach passive income related forms such as schedule E and form 8582 (for carryover loss) 

一年一年去改。要是懶的話不用改，將錯就錯。