I got my final consolidated 1099 from Fido this weekend and tried two approaches.
1) Went to FreeTaxUSA's (FTU) website and did my federal return online without filing.
2) Used Fido's free offer of TurboTax Premier online and did my federal return there (with Win 10 because I don't want to upgrade to Win 11).
Final results were identical. No savings were missed by either app. Since I am a Nevada resident for tax purposes, there was no state return to file.
Comparing the two apps the TT return contained more sales detail on stocks and options I traded whereas FTU simply attached my consolidated 1099 to the return while reporting only the summary totals in the schedule forms. TT had more upselling throughout the process although FTU also had it in a few places.
I e-filed the TT prepared return and it was accepted by the IRS a few hours later.
Bottom line - If in the future I don't get the free TT offer from Fido, I will try FTU again, since there appears to be no difference in the final results on a modestly complex return with lots of investment activity.