i experienced same problem with the message saying Form 1116 has a value on line 10 Carryover Foreign tax for Schedule B line 3.... and cannot e-file.
So if Turbotax now not supporting this e-file, are you suggesting to move the entire Tax File Return to another software to fix this .. do they automatically upload/import all the tax data from the Turbotax data file?
it is very frustrating as this is the only form that TT ask for print to mail..
any other better suggestions as i have been using TT for decades
