I have earlier year lump sum Social Security payments. The Earlier Year Tax Return smart worksheet for 1040 line 5, line D of the worksheet asks me for my 2018 Form 1040 line 5a, but it won't accept the amount. (The error alert says that it should be no more than 85% of line B earlier year total SSA benefits.) I suspect that it wants the taxable benefits from 2018, not the total benefits. But the taxable benefits seem to be on line 5b of my 2018 1040, not on line 5a as requested. Is this, as I suspect, a TurboTax glitch, in which case should I use the figure from my 2018 1040 line 5b? If not, how do I proceed. The amount that was on line 5a is exactly my 2018 total benefits, and therefore can't be 85% of those benefits. Thanks for the hoped-for help.
