Those are all return types.
If you are a US Citizen or resident you would file a 1040 or if you are over 65 a 1040SR
If you are a Non-Resident Alien you would file a 1040NR
If you are changing your return you would file a 1040-X.
This would not be on your 1099-SSA, you would enter your 1099-SSA and it would then be entered on your 1040 or 1040SR if you are not changing your return and not a non resident alien
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