Having form 1116 available is not the end of this sad story. It gets worse.
There is a new form required for the Foreign Tax Credit if any amount is entered on line 10 of form1116. This new form is the Form 1116 Sch B, Foreign Tax Carryover Reconciliation Schedule.
According to Turbo Tax's form availability page the Form 116 Sch B, Foreign Tax Carryover Reconciliation Schedule will not be supported for e-filing. - https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_fed_online_individual.html
The result appears to be that if anything is entered on Form 1116 line 10 then Turbo Tax will not be able to do the e-file.
See the discussion related to this on this other thread specifically related to it:
https://ttlc.intuit.com/community/tax-credits-deductions/discussion/2021-form-1116-schedule-b-carryo...
