I suggest you go back through the lump-sum payment screen entries in the Social Security section under Retirement Plans and Social Security in the Wages and Income area of TurboTax. Look for a screen that says Review your Lump Sum Payment Information and make sure you answered all the questions in that section correctly.
If that does not resolve your issue, use the delete option on the screen that says Review your Lump Sum Payment Information to delete the lump sum payment entries. Then, check to see if you still have an error. Then you can re-enter the lump sum payment entries, making sure you answer the questions accurately.
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