All I could find on the support site was this reference to "boxes" my Turbotax programs do not have"
Enter the sales info and then click on the second box right below for
This sale involves an employee stock plan or an uncommon situation
Then click on Start Now.
Since you took the Summary election, you won't get the option to enter a 1099-B tax withheld.
Instead list it as an "Estimated Tax Payment" under
Deductions and credits -- Other income taxes.
go back and choose one sale at a time. You can't use Summary election for transactions with adjustments. (Withholding is not an adjustment.)