I spent some time on the phone with turbotax and they don't have any recommended workarounds for this or any explanation of why they broke the support this year. Interestingly, if you pick a working credit and then try to use the "other pdf" box it does attempt to attach whatever you put into other, but then it seems to end up with nonsense during efile and fails with errors like this:
2021-03-07 16:33:39,017 [1] 2020.48.20.71 ERROR Intuit.Ctg.Wte.Service -
We are having difficulty recognizing the data you are sending. Please try again. - 601ERRV:?, FilingHdr_43 - ?:? - Invalid bodyComponentDescriptor name:
I tried one last time where it is filled in as a rehab credit and then squashed back down to $0 and it submits, but I'm pretty sure it does not send any attachments. I attached the SysInternals ProcessMonitor debugging and do not see it read the attachment. So I've submitted without the attachment and expect to hear from new york about a missing attachment. Hopefully that is faster to fix than paper filing.
Good luck to you too.
