第三部分关于household income的部分，关于我妈妈的部分，问题Did you or your household member,whose income is being included, file a federal tax return? yes/no
（这个问题 我的理解是写NO,因为我妈妈是B2不用报税）
还有个问题是
if you and your household members did not file, select the reason for not filing,and provide an explanation.
1, plan to file the tax return before the due date for this year.
2 ,not required to file a tax return（ provide an explanation）
3filed for an extension
（这个问题我自己理解是应该选第二个not required to file a tax return,理由依然是B2不用报税）
请问我的理解是对的吗？