When you are entering income on a joint return, every income entry screen will either have a spot with both spouse’s names there, or when you click to enter a W-2, 1099R, etc. it will ask you by name which spouse it is for. You do not have to wait for the software to “ask” you for your spouse’s income.
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I had a situation like this for my son. His new wife is here legally but not yet officially a citizen. There's a grace period for people in this situation of a year I think. If she has a SS# but no tax withholding from her job or if she doesn't have a job, or if she earned her income in another county, I don't believe you need to include her income. So say you've applied for her green card and she's here on a spouse visa. Just file it normally and then next year when she becomes a citizen you will include her income and W2 if she gets one. TurboTax will ask you the questions regarding her status. - If this is your situation. - Best if you research this yourself but this was the way I handled it. There is some supporting information about this online but it's not super clear. Make sure to file jointly but you seem to be doing that.