topic Is this information in box 3? in Retirement tax questions

On SSA-1099 I have entry 'Subtract Non-taxable payments - $629.40?

trevose19047 — Mon, 03 Jun 2019 20:16:15 GMT

There was no option for this entry?

DianeW — Mon, 03 Jun 2019 20:16:16 GMT

Is this information in box 3?

DianeW — Mon, 03 Jun 2019 20:16:18 GMT

On your SSA-1099 form any adjustments are already reflected in box 5 as the net amount of your taxable social security benefits.

On your tax return you only enter the net income shown in box 5 of the Form SSA-1099.

To enter your Social Security benefits reported on form SSA-1099

Lisa3588 — Wed, 03 Feb 2021 13:54:24 GMT

So, if I ignore the amount labeled:

SUBTRACT:
Non-Taxable payments $260.40,

isn't my Part B Medicare Premium Paid overstated?