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The amounts are shown down at the bottom of the box labeled "description of amount in box 3" om the SSA-1099.  Box 5 Net Benefits for 2023 is equal to box 3 benefits paid amount.

I made the assumption that the amounts were prior years underpayments, not overpayments.  If not underpayments, what are these additional amounts for prior years included in the 2023-year benefits?

 

Thanks for any assistance.