Apparently YOU GUYS HAVE CALCULATED MY TAXES INCORRECTLY FOR THE LAST 4YEARS! There were no SSA taxes calculated for my benefits.(line 20a /20b form1040)

[jerry2000]

That is probably because you did not enter the correct information. The Turbotax calculation of the taxable SS is absolutely correct and it has been approved by the IRS. So any error in that calculation is due to you not entering the correct information into Turbotax.

[fanfare]

Or more likely, your benefits were not taxable.