這案並不存在欺騙等。在離婚pending期，你們有option to file joint return OR

separate return。問題出在報稅時你們沒有及時communicate to determine filing status. 現在最主要的是你倆決定filing status。為時不晚。對方怎知道你的earned and other incomes？I suspect that the joint filing may not be complete.