If you opened your return after filing and changed even one small number (perhaps to "see what would happen" or to test a deduction) before clicking the "Amend" button, TurboTax now thinks that "changed" version is your original. When you then start the amendment, it pulls those "in-progress" numbers into Column A.
If you are certain you didn't touch the file before amending, it's possible there were software updates after the time you filed and before you amended. The new calculation might retroactively apply to your "Original" column, causing a mismatch with what you actually e-filed months ago.
To fix this, go into Forms Mode, open the 1040X Worksheet, and manually correct the figures in Column A to match your original 'as-filed' return. This ensures the software calculates the 'Change' (Column B) correctly based on the 'Correct Amount' (Column C)."
How to amend my return?
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