I had not lived with my wife for 2021. However, when "married" is chosen, the turbotax keeps asking her SSN, which she doesn't have (foreign national). Don't knowwhattodo

If you are filing married Filing jointly, here is the procedure on how to file. Follow these precise steps.

1. Prepare your return in TurboTax.
2. When you get to the Let’s get ready to e-file screen, select File by Mail.
3. Attach a statement to your return, signed by each of you that states that one of you is a U.S. citizen and the other is a nonresident alien and that you’re electing to both be treated as U.S. residents for tax purposes. Include the full name, address and Social Security number (or Individual Taxpayer Identification Number) of each spouse. This won’t affect the immigration status of the nonresident alien.
4. Mail the return to the address on the instruction sheet that prints with the return.

If your spouse doesn’t have a Social Security number or ITIN, you’ll need to apply for one when you mail in your return. To do this, follow steps 1–3 above and then do this:

1. Fill out Form W-7 and attach it to your return, as well as all necessary documentation.
2. Mail the return to the address specified in the Form W-7 instructions.

Note: TurboTax will give you an error regarding the missing Social Security number for your spouse. You can ignore the error since you’re printing your return.

To clarify, what type of foreign income do you wish to report if that was part of your question listed above.

To file separately without the SSN or ITIN: 

• In the program, leave the SSN space blank
• After completing the return, print out the forms.  Write “NRA” in the spouse's SSN space. ( NRA stands for Nonresident Alien). Do not leave the space blank. 
• Submit all the forms and required documents to IRS based on the instructions on your print-out.