Using Home & Business CD for Mac and was able to complete my Form 1116 today after updating. Good news is that it still includes the carryover worksheet and calculates Part III Line 10 correctly. Bad news, as expected, that you still get the error "Total Incoming C/O has a value. This will require Form 116, Schedule B which will be available in a future product update."
From the parallel thread--Options to work around the Schedule B delay:
a) Take a deduction instead of a credit.
b) State that you have no carryforward/carryback credits (or choose not to use them this year).
c) Do (a) or (b) now and file electronically, then file an amended return via mail on March 31 to handle the difference. You may not need to file an amended state return if you go this route.
d) Just wait till March 31 and file via mail.
https://ttlc.intuit.com/community/tax-credits-deductions/discussion/2021-form-1116-schedule-b-carryo...
I would add an additional option:
e) File now via mail by printing out your return and attaching Schedule B after downloading and completing it. (TurboTax tells you there's an error when you try to print but you can override it and "print for filing" without a problem)
Schedule B: https://www.irs.gov/pub/irs-pdf/f1116sb.pdf
Schedule B instructions and worksheet: https://www.irs.gov/pub/irs-pdf/i1116sb.pdf
For the optimistic among us, there's encouraging news from the same thread: "At this time, our engineers are working to update TurboTax to be able to e-file the information with PDF capabilities. The estimated date for the update is March 31st." https://ttlc.intuit.com/community/tax-credits-deductions/discussion/2021-form-1116-schedule-b-carryo...
