Form W-4 - T : Filing Status must be entered

Smart Check gives me the above error, and then shows me four radio-buttons to select one:
No Entry
Singe
Married
Line 34

My filing status is "Qualified Widower" and I do not want to change that this year, so I'm confused about which option I should select to fix this error (and what does "Line 34" have to do with it?).

Whenever I select No Entry, TurboTax keeps coming back with this as an error needing to be fixed.