You do not need to file a return in the US. In your first question you asked if you needed to get a Social Security number for your husband to file his return, and I gave you my reply, which was:
Your husband can file his own separate return unless he chooses to file a joint return and include your income and include you as a dependent. If he wants to include you then you need a taxpayer ID number (ITIN) and you would fill out Form W-7 and send it in with his tax return. If he wants to file a separate return, then you do not need any US tax ID number.
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My husband wants to know why I need a US return? Because I don't live in the US, and I'm not a citizen or even a resident yet. Thanks for your prompt last reply.
Nobody said that you needed to file a US return. You do not need to file a US return. Your husband needs to file a return, but you do not need to file a return.
When your husband files a return he has the choice to include you on his return if he wants to but it is not required.